Номер 1, страница 161, часть 1 - гдз по алгебре 10 класс учебник Пак, Ардакулы

Алгебра, 10 класс Учебник, авторы: Пак Олег Владимирович, Ардакулы Дархан, Ескендирова Елена Викторовна, издательство Алматыкітап баспасы, Алматы, 2019

Авторы: Пак О. В., Ардакулы Д., Ескендирова Е. В.

Тип: Учебник

Издательство: Алматыкітап баспасы

Год издания: 2019 - 2026

Часть: 1

ISBN: 978-601-01-3958-9

Рекомендовано Министерством образования и науки Республики Казахстан

Часть 1. Глава 3. Тригонометрические уравнения и неравенства. Параграф 3. Простейшие тригонометрические неравенства. 3.1. Неравенства, содержащие sinx. Задачи - номер 1, страница 161.

App\Models\Task {#1030 // resources/views/models/task/default.blade.php
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                            "created_at" => "2026-04-10 13:58:26"
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                          ]
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                      ]
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                    }
                    "field_country" => Illuminate\Database\Eloquent\Collection {#1068
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                        0 => App\Models\Term {#1072
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                            ]
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                      ]
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                    }
                    "field_city" => Illuminate\Database\Eloquent\Collection {#1069
                      #items: array:1 [
                        0 => App\Models\Term {#1070
                          #connection: "mysql"
                          #table: "terms"
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                          #keyType: "int"
                          +incrementing: false
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                          #attributes: array:6 [
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                            "created_at" => "2026-04-10 13:58:26"
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                            ]
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                          ]
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                      ]
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                    }
                    "field_series" => Illuminate\Database\Eloquent\Collection {#1071
                      #items: []
                      #escapeWhenCastingToString: false
                    }
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                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_level_of_education" => Illuminate\Database\Eloquent\Collection {#1079
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_standart_of_education" => Illuminate\Database\Eloquent\Collection {#1080
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                      #escapeWhenCastingToString: false
                    }
                    "field_publication_number" => null
                    "field_publication_type" => Illuminate\Database\Eloquent\Collection {#1081
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                      #escapeWhenCastingToString: false
                    }
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                      #escapeWhenCastingToString: false
                    }
                    "field_under_the_edition_degree" => null
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                    "field_part" => "1, 2"
                    "field_part_writing" => "Часть"
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                    "field_for_whom" => "Учебник для учащихся 10 класса общеобразовательной школы общественно-гуманитарного направления"
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                    ]
                    "field_cover_alts" => array:1 [
                      0 => ""
                    ]
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                      ]
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                    }
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                    }
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                    }
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                    "field_cover_color" => Illuminate\Database\Eloquent\Collection {#1086
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                    "field_cover_color" => Illuminate\Database\Eloquent\Collection {#1086}
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    "parent_branches" => Illuminate\Database\Eloquent\Collection {#1108
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        0 => App\Models\Branch {#1120
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          #keyType: "int"
          +incrementing: true
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                0 => App\Models\Term {#1047}
              ]
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            }
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            "field_branch_cover" => array:1 [
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            ]
            "field_branch_covers" => array:1 [
              0 => array:4 [
                "path" => "/media/algebra_10/baspasy-u19/covers/cover1.webp?ts=1752152865"
                "alt" => ""
                "width" => "1940"
                "height" => "2895"
              ]
            ]
            "book" => Illuminate\Database\Eloquent\Collection {#1122
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                0 => App\Models\Book {#1057}
              ]
              #escapeWhenCastingToString: false
            }
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1123
              #items: []
              #escapeWhenCastingToString: false
            }
          ]
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            "field_url" => null
            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1121}
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            0 => "*"
          ]
        }
        1 => App\Models\Branch {#1124
          #connection: "mysql"
          #table: "branches"
          #primaryKey: "id"
          #keyType: "int"
          +incrementing: true
          #with: []
          #withCount: []
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          #perPage: 15
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          #attributes: array:24 [
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            "created_at" => "2026-04-10 13:58:26"
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            "field_url" => null
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                0 => App\Models\Term {#1125
                  #connection: "mysql"
                  #table: "terms"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: false
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                  #withCount: []
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                  #perPage: 15
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                  #attributes: array:7 [
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                    "created_at" => "2026-04-10 13:58:26"
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                      "field_genitive_case" => "Главы"
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                      "field_prepositional_case" => "Главе"
                    ]
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                  ]
                  #original: array:7 [
                    "id" => 29
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
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                      "field_prepositional_case" => "Главе"
                    ]
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                  ]
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                    0 => "*"
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            "field_branch_covers" => []
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                0 => App\Models\Book {#1057}
              ]
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            }
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1126
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                0 => App\Models\Branch {#1045}
              ]
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          ]
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            "field_branch_order" => "3"
            "field_url" => null
            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1128}
            "field_page_start" => "122"
            "field_branch_display" => "0"
            "field_branch_expanded" => "0"
            "field_display_branch_in_title" => "1"
            "field_display_task_interval" => "0"
            "field_display_branch_page" => "1"
            "field_branch_title_in_content" => "0"
            "field_navigation_title" => null
            "field_metatags_title" => null
            "field_metatags_description" => null
            "field_h1" => null
            "field_description_top" => null
            "field_description_bottom" => null
            "field_branch_cover" => []
            "field_branch_covers" => []
            "book" => Illuminate\Database\Eloquent\Collection {#1127}
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1126}
          ]
          #changes: []
          #casts: []
          #classCastCache: []
          #attributeCastCache: []
          #dateFormat: null
          #appends: []
          #dispatchesEvents: []
          #observables: []
          #relations: []
          #touches: []
          +timestamps: true
          +usesUniqueIds: false
          #hidden: []
          #visible: []
          #fillable: []
          #guarded: array:1 [
            0 => "*"
          ]
        }
        2 => App\Models\Branch {#1129
          #connection: "mysql"
          #table: "branches"
          #primaryKey: "id"
          #keyType: "int"
          +incrementing: true
          #with: []
          #withCount: []
          +preventsLazyLoading: false
          #perPage: 15
          +exists: true
          +wasRecentlyCreated: false
          #escapeWhenCastingToString: false
          #attributes: array:24 [
            "id" => 1119399
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_display_title" => "Простейшие тригонометрические неравенства"
            "field_branch_order" => "3"
            "field_url" => null
            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1133
              #items: array:1 [
                0 => App\Models\Term {#1130
                  #connection: "mysql"
                  #table: "terms"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: false
                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
                  #perPage: 15
                  +exists: true
                  +wasRecentlyCreated: false
                  #escapeWhenCastingToString: false
                  #attributes: array:7 [
                    "id" => 32
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "name" => "Параграф"
                    "field_cases" => array:6 [
                      "field_accusative_case" => "Параграф"
                      "field_creative_case" => "Параграфом"
                      "field_dative_case" => "Параграфу"
                      "field_genitive_case" => "Параграфа"
                      "field_nominative_case" => "Параграф"
                      "field_prepositional_case" => "Параграфе"
                    ]
                    "field_page_check_not_needed" => null
                    "field_short_name" => "§"
                  ]
                  #original: array:7 [
                    "id" => 32
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "name" => "Параграф"
                    "field_cases" => array:6 [
                      "field_accusative_case" => "Параграф"
                      "field_creative_case" => "Параграфом"
                      "field_dative_case" => "Параграфу"
                      "field_genitive_case" => "Параграфа"
                      "field_nominative_case" => "Параграф"
                      "field_prepositional_case" => "Параграфе"
                    ]
                    "field_page_check_not_needed" => null
                    "field_short_name" => "§"
                  ]
                  #changes: []
                  #casts: []
                  #classCastCache: []
                  #attributeCastCache: []
                  #dateFormat: null
                  #appends: []
                  #dispatchesEvents: []
                  #observables: []
                  #relations: []
                  #touches: []
                  +timestamps: true
                  +usesUniqueIds: false
                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [
                    0 => "*"
                  ]
                }
              ]
              #escapeWhenCastingToString: false
            }
            "field_page_start" => "157"
            "field_branch_display" => "0"
            "field_branch_expanded" => "0"
            "field_display_branch_in_title" => "1"
            "field_display_task_interval" => "0"
            "field_display_branch_page" => "1"
            "field_branch_title_in_content" => "0"
            "field_navigation_title" => null
            "field_metatags_title" => null
            "field_metatags_description" => null
            "field_h1" => null
            "field_description_top" => null
            "field_description_bottom" => null
            "field_branch_cover" => []
            "field_branch_covers" => []
            "book" => Illuminate\Database\Eloquent\Collection {#1132
              #items: array:1 [
                0 => App\Models\Book {#1057}
              ]
              #escapeWhenCastingToString: false
            }
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1141
              #items: array:1 [
                0 => App\Models\Branch {#1140
                  #connection: "mysql"
                  #table: "branches"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: true
                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
                  #perPage: 15
                  +exists: true
                  +wasRecentlyCreated: false
                  #escapeWhenCastingToString: false
                  #attributes: array:24 [
                    "id" => 1119382
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "field_display_title" => "Тригонометрические уравнения и неравенства"
                    "field_branch_order" => "3"
                    "field_url" => null
                    "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1142
                      #items: array:1 [
                        0 => App\Models\Term {#1125}
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "field_page_start" => "122"
                    "field_branch_display" => "0"
                    "field_branch_expanded" => "0"
                    "field_display_branch_in_title" => "1"
                    "field_display_task_interval" => "0"
                    "field_display_branch_page" => "1"
                    "field_branch_title_in_content" => "0"
                    "field_navigation_title" => null
                    "field_metatags_title" => null
                    "field_metatags_description" => null
                    "field_h1" => null
                    "field_description_top" => null
                    "field_description_bottom" => null
                    "field_branch_cover" => []
                    "field_branch_covers" => []
                    "book" => Illuminate\Database\Eloquent\Collection {#1143
                      #items: array:1 [
                        0 => App\Models\Book {#1057}
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "branch_parent" => Illuminate\Database\Eloquent\Collection {#1144
                      #items: array:1 [
                        0 => App\Models\Branch {#1045}
                      ]
                      #escapeWhenCastingToString: false
                    }
                  ]
                  #original: array:24 [
                    "id" => 1119382
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "field_display_title" => "Тригонометрические уравнения и неравенства"
                    "field_branch_order" => "3"
                    "field_url" => null
                    "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1142}
                    "field_page_start" => "122"
                    "field_branch_display" => "0"
                    "field_branch_expanded" => "0"
                    "field_display_branch_in_title" => "1"
                    "field_display_task_interval" => "0"
                    "field_display_branch_page" => "1"
                    "field_branch_title_in_content" => "0"
                    "field_navigation_title" => null
                    "field_metatags_title" => null
                    "field_metatags_description" => null
                    "field_h1" => null
                    "field_description_top" => null
                    "field_description_bottom" => null
                    "field_branch_cover" => []
                    "field_branch_covers" => []
                    "book" => Illuminate\Database\Eloquent\Collection {#1143}
                    "branch_parent" => Illuminate\Database\Eloquent\Collection {#1144}
                  ]
                  #changes: []
                  #casts: []
                  #classCastCache: []
                  #attributeCastCache: []
                  #dateFormat: null
                  #appends: []
                  #dispatchesEvents: []
                  #observables: []
                  #relations: []
                  #touches: []
                  +timestamps: true
                  +usesUniqueIds: false
                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [
                    0 => "*"
                  ]
                }
              ]
              #escapeWhenCastingToString: false
            }
          ]
          #original: array:24 [
            "id" => 1119399
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_display_title" => "Простейшие тригонометрические неравенства"
            "field_branch_order" => "3"
            "field_url" => null
            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1133}
            "field_page_start" => "157"
            "field_branch_display" => "0"
            "field_branch_expanded" => "0"
            "field_display_branch_in_title" => "1"
            "field_display_task_interval" => "0"
            "field_display_branch_page" => "1"
            "field_branch_title_in_content" => "0"
            "field_navigation_title" => null
            "field_metatags_title" => null
            "field_metatags_description" => null
            "field_h1" => null
            "field_description_top" => null
            "field_description_bottom" => null
            "field_branch_cover" => []
            "field_branch_covers" => []
            "book" => Illuminate\Database\Eloquent\Collection {#1132}
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1141}
          ]
          #changes: []
          #casts: []
          #classCastCache: []
          #attributeCastCache: []
          #dateFormat: null
          #appends: []
          #dispatchesEvents: []
          #observables: []
          #relations: []
          #touches: []
          +timestamps: true
          +usesUniqueIds: false
          #hidden: []
          #visible: []
          #fillable: []
          #guarded: array:1 [
            0 => "*"
          ]
        }
        3 => App\Models\Branch {#1134
          #connection: "mysql"
          #table: "branches"
          #primaryKey: "id"
          #keyType: "int"
          +incrementing: true
          #with: []
          #withCount: []
          +preventsLazyLoading: false
          #perPage: 15
          +exists: true
          +wasRecentlyCreated: false
          #escapeWhenCastingToString: false
          #attributes: array:24 [
            "id" => 1119400
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_display_title" => "3.1. Неравенства, содержащие sinx"
            "field_branch_order" => null
            "field_url" => null
            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1131
              #items: []
              #escapeWhenCastingToString: false
            }
            "field_page_start" => "157"
            "field_branch_display" => "0"
            "field_branch_expanded" => "0"
            "field_display_branch_in_title" => "1"
            "field_display_task_interval" => "0"
            "field_display_branch_page" => "1"
            "field_branch_title_in_content" => "0"
            "field_navigation_title" => null
            "field_metatags_title" => null
            "field_metatags_description" => null
            "field_h1" => null
            "field_description_top" => null
            "field_description_bottom" => null
            "field_branch_cover" => []
            "field_branch_covers" => []
            "book" => Illuminate\Database\Eloquent\Collection {#1137
              #items: array:1 [
                0 => App\Models\Book {#1057}
              ]
              #escapeWhenCastingToString: false
            }
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1150
              #items: array:1 [
                0 => App\Models\Branch {#1149
                  #connection: "mysql"
                  #table: "branches"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: true
                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
                  #perPage: 15
                  +exists: true
                  +wasRecentlyCreated: false
                  #escapeWhenCastingToString: false
                  #attributes: array:24 [
                    "id" => 1119399
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "field_display_title" => "Простейшие тригонометрические неравенства"
                    "field_branch_order" => "3"
                    "field_url" => null
                    "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1151
                      #items: array:1 [
                        0 => App\Models\Term {#1130}
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "field_page_start" => "157"
                    "field_branch_display" => "0"
                    "field_branch_expanded" => "0"
                    "field_display_branch_in_title" => "1"
                    "field_display_task_interval" => "0"
                    "field_display_branch_page" => "1"
                    "field_branch_title_in_content" => "0"
                    "field_navigation_title" => null
                    "field_metatags_title" => null
                    "field_metatags_description" => null
                    "field_h1" => null
                    "field_description_top" => null
                    "field_description_bottom" => null
                    "field_branch_cover" => []
                    "field_branch_covers" => []
                    "book" => Illuminate\Database\Eloquent\Collection {#1152
                      #items: array:1 [
                        0 => App\Models\Book {#1057}
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "branch_parent" => Illuminate\Database\Eloquent\Collection {#1153
                      #items: array:1 [
                        0 => App\Models\Branch {#1140}
                      ]
                      #escapeWhenCastingToString: false
                    }
                  ]
                  #original: array:24 [
                    "id" => 1119399
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "field_display_title" => "Простейшие тригонометрические неравенства"
                    "field_branch_order" => "3"
                    "field_url" => null
                    "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1151}
                    "field_page_start" => "157"
                    "field_branch_display" => "0"
                    "field_branch_expanded" => "0"
                    "field_display_branch_in_title" => "1"
                    "field_display_task_interval" => "0"
                    "field_display_branch_page" => "1"
                    "field_branch_title_in_content" => "0"
                    "field_navigation_title" => null
                    "field_metatags_title" => null
                    "field_metatags_description" => null
                    "field_h1" => null
                    "field_description_top" => null
                    "field_description_bottom" => null
                    "field_branch_cover" => []
                    "field_branch_covers" => []
                    "book" => Illuminate\Database\Eloquent\Collection {#1152}
                    "branch_parent" => Illuminate\Database\Eloquent\Collection {#1153}
                  ]
                  #changes: []
                  #casts: []
                  #classCastCache: []
                  #attributeCastCache: []
                  #dateFormat: null
                  #appends: []
                  #dispatchesEvents: []
                  #observables: []
                  #relations: []
                  #touches: []
                  +timestamps: true
                  +usesUniqueIds: false
                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [
                    0 => "*"
                  ]
                }
              ]
              #escapeWhenCastingToString: false
            }
          ]
          #original: array:24 [
            "id" => 1119400
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_display_title" => "3.1. Неравенства, содержащие sinx"
            "field_branch_order" => null
            "field_url" => null
            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1131}
            "field_page_start" => "157"
            "field_branch_display" => "0"
            "field_branch_expanded" => "0"
            "field_display_branch_in_title" => "1"
            "field_display_task_interval" => "0"
            "field_display_branch_page" => "1"
            "field_branch_title_in_content" => "0"
            "field_navigation_title" => null
            "field_metatags_title" => null
            "field_metatags_description" => null
            "field_h1" => null
            "field_description_top" => null
            "field_description_bottom" => null
            "field_branch_cover" => []
            "field_branch_covers" => []
            "book" => Illuminate\Database\Eloquent\Collection {#1137}
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1150}
          ]
          #changes: []
          #casts: []
          #classCastCache: []
          #attributeCastCache: []
          #dateFormat: null
          #appends: []
          #dispatchesEvents: []
          #observables: []
          #relations: []
          #touches: []
          +timestamps: true
          +usesUniqueIds: false
          #hidden: []
          #visible: []
          #fillable: []
          #guarded: array:1 [
            0 => "*"
          ]
        }
        4 => App\Models\Branch {#1138
          #connection: "mysql"
          #table: "branches"
          #primaryKey: "id"
          #keyType: "int"
          +incrementing: true
          #with: []
          #withCount: []
          +preventsLazyLoading: false
          #perPage: 15
          +exists: true
          +wasRecentlyCreated: false
          #escapeWhenCastingToString: false
          #attributes: array:24 [
            "id" => 1119401
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_display_title" => "Задачи"
            "field_branch_order" => null
            "field_url" => null
            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1135
              #items: []
              #escapeWhenCastingToString: false
            }
            "field_page_start" => "157"
            "field_branch_display" => "0"
            "field_branch_expanded" => "0"
            "field_display_branch_in_title" => "1"
            "field_display_task_interval" => "0"
            "field_display_branch_page" => "1"
            "field_branch_title_in_content" => "0"
            "field_navigation_title" => null
            "field_metatags_title" => null
            "field_metatags_description" => null
            "field_h1" => null
            "field_description_top" => null
            "field_description_bottom" => null
            "field_branch_cover" => []
            "field_branch_covers" => []
            "book" => Illuminate\Database\Eloquent\Collection {#1146
              #items: array:1 [
                0 => App\Models\Book {#1057}
              ]
              #escapeWhenCastingToString: false
            }
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1159
              #items: array:1 [
                0 => App\Models\Branch {#1158
                  #connection: "mysql"
                  #table: "branches"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: true
                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
                  #perPage: 15
                  +exists: true
                  +wasRecentlyCreated: false
                  #escapeWhenCastingToString: false
                  #attributes: array:24 [
                    "id" => 1119400
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "field_display_title" => "3.1. Неравенства, содержащие sinx"
                    "field_branch_order" => null
                    "field_url" => null
                    "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1160
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_page_start" => "157"
                    "field_branch_display" => "0"
                    "field_branch_expanded" => "0"
                    "field_display_branch_in_title" => "1"
                    "field_display_task_interval" => "0"
                    "field_display_branch_page" => "1"
                    "field_branch_title_in_content" => "0"
                    "field_navigation_title" => null
                    "field_metatags_title" => null
                    "field_metatags_description" => null
                    "field_h1" => null
                    "field_description_top" => null
                    "field_description_bottom" => null
                    "field_branch_cover" => []
                    "field_branch_covers" => []
                    "book" => Illuminate\Database\Eloquent\Collection {#1161
                      #items: array:1 [
                        0 => App\Models\Book {#1057}
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "branch_parent" => Illuminate\Database\Eloquent\Collection {#1162
                      #items: array:1 [
                        0 => App\Models\Branch {#1149}
                      ]
                      #escapeWhenCastingToString: false
                    }
                  ]
                  #original: array:24 [
                    "id" => 1119400
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "field_display_title" => "3.1. Неравенства, содержащие sinx"
                    "field_branch_order" => null
                    "field_url" => null
                    "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1160}
                    "field_page_start" => "157"
                    "field_branch_display" => "0"
                    "field_branch_expanded" => "0"
                    "field_display_branch_in_title" => "1"
                    "field_display_task_interval" => "0"
                    "field_display_branch_page" => "1"
                    "field_branch_title_in_content" => "0"
                    "field_navigation_title" => null
                    "field_metatags_title" => null
                    "field_metatags_description" => null
                    "field_h1" => null
                    "field_description_top" => null
                    "field_description_bottom" => null
                    "field_branch_cover" => []
                    "field_branch_covers" => []
                    "book" => Illuminate\Database\Eloquent\Collection {#1161}
                    "branch_parent" => Illuminate\Database\Eloquent\Collection {#1162}
                  ]
                  #changes: []
                  #casts: []
                  #classCastCache: []
                  #attributeCastCache: []
                  #dateFormat: null
                  #appends: []
                  #dispatchesEvents: []
                  #observables: []
                  #relations: []
                  #touches: []
                  +timestamps: true
                  +usesUniqueIds: false
                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [
                    0 => "*"
                  ]
                }
              ]
              #escapeWhenCastingToString: false
            }
          ]
          #original: array:24 [
            "id" => 1119401
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_display_title" => "Задачи"
            "field_branch_order" => null
            "field_url" => null
            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1135}
            "field_page_start" => "157"
            "field_branch_display" => "0"
            "field_branch_expanded" => "0"
            "field_display_branch_in_title" => "1"
            "field_display_task_interval" => "0"
            "field_display_branch_page" => "1"
            "field_branch_title_in_content" => "0"
            "field_navigation_title" => null
            "field_metatags_title" => null
            "field_metatags_description" => null
            "field_h1" => null
            "field_description_top" => null
            "field_description_bottom" => null
            "field_branch_cover" => []
            "field_branch_covers" => []
            "book" => Illuminate\Database\Eloquent\Collection {#1146}
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1159}
          ]
          #changes: []
          #casts: []
          #classCastCache: []
          #attributeCastCache: []
          #dateFormat: null
          #appends: []
          #dispatchesEvents: []
          #observables: []
          #relations: []
          #touches: []
          +timestamps: true
          +usesUniqueIds: false
          #hidden: []
          #visible: []
          #fillable: []
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      #escapeWhenCastingToString: false
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    "content" => Illuminate\Database\Eloquent\Collection {#1038
      #items: array:2 [
        0 => App\Models\Element {#1100
          #connection: "mysql"
          #table: "elements"
          #primaryKey: "id"
          #keyType: "int"
          +incrementing: true
          #with: []
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          +preventsLazyLoading: false
          #perPage: 15
          +exists: true
          +wasRecentlyCreated: false
          #escapeWhenCastingToString: false
          #attributes: array:7 [
            "id" => 1300620
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "edition" => Illuminate\Database\Eloquent\Collection {#1091
              #items: array:1 [
                0 => App\Models\Edition {#1090
                  #connection: "mysql"
                  #table: "editions"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: false
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                  #attributes: array:21 [
                    "id" => 4962
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "title" => "Условие"
                    "field_order" => "1"
                    "field_publisher" => Illuminate\Database\Eloquent\Collection {#1089
                      #items: array:1 [
                        0 => App\Models\Term {#1063}
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "field_content_type" => "free"
                    "field_content_mode" => "text, image"
                    "field_page_content_mode" => "image"
                    "field_content_text_checked" => null
                    "field_page_content_text_checked" => "0"
                    "field_solution_author" => "Автор"
                    "field_moderator" => "pasha"
                    "field_edition_type" => "statement"
                    "field_root_dir" => "0-"
                    "field_responsible" => Illuminate\Database\Eloquent\Collection {#1052
                      #items: []
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                    "field_comment" => null
                    "field_similar_book" => Illuminate\Database\Eloquent\Collection {#1088
                      #items: []
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                    "field_process_formula" => "katex"
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                    "updated_at" => null
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                    "field_order" => "1"
                    "field_publisher" => Illuminate\Database\Eloquent\Collection {#1089}
                    "field_content_type" => "free"
                    "field_content_mode" => "text, image"
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                    "field_page_content_text_checked" => "0"
                    "field_solution_author" => "Автор"
                    "field_moderator" => "pasha"
                    "field_edition_type" => "statement"
                    "field_root_dir" => "0-"
                    "field_responsible" => Illuminate\Database\Eloquent\Collection {#1052}
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                  ]
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            "task" => array:2 [
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              "type" => "task"
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            "text" => "<p>Решите неравенства (1-3):</p><p>1.</p><p><strong>a)</strong> $sin x &gt; 0$;</p><p><strong>б)</strong> $sin 3x \ge 0$;</p><p><strong>в)</strong> $sin \frac{x}{3} &lt; 0$;</p><p><strong>г)</strong> $sin \left(x - \frac{\pi}{6}\right) \le 0$;</p><p><strong>д)</strong> $sin \left(\frac{5x}{6} - \frac{5\pi}{6}\right) \le 0$.</p>"
            "img" => array:1 [
              0 => array:5 [
                "name" => "1-1.jpg"
                "alt" => null
                "width" => "1425"
                "height" => 498
                "path" => "/media/algebra_10/baspasy-u19/0-3-3-1zad/1-1.webp?ts=1753534676"
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            "id" => 1300620
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "edition" => Illuminate\Database\Eloquent\Collection {#1091}
            "task" => array:2 [
              "refs" => "1119935"
              "type" => "task"
            ]
            "text" => "<p>Решите неравенства (1-3):</p><p>1.</p><p><strong>a)</strong> $sin x &gt; 0$;</p><p><strong>б)</strong> $sin 3x \ge 0$;</p><p><strong>в)</strong> $sin \frac{x}{3} &lt; 0$;</p><p><strong>г)</strong> $sin \left(x - \frac{\pi}{6}\right) \le 0$;</p><p><strong>д)</strong> $sin \left(\frac{5x}{6} - \frac{5\pi}{6}\right) \le 0$.</p>"
            "img" => array:1 [
              0 => array:5 [
                "name" => "1-1.jpg"
                "alt" => null
                "width" => "1425"
                "height" => 498
                "path" => "/media/algebra_10/baspasy-u19/0-3-3-1zad/1-1.webp?ts=1753534676"
              ]
            ]
          ]
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          #attributeCastCache: []
          #dateFormat: null
          #appends: []
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          #hidden: []
          #visible: []
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            0 => "*"
          ]
        }
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          #connection: "mysql"
          #table: "elements"
          #primaryKey: "id"
          #keyType: "int"
          +incrementing: true
          #with: []
          #withCount: []
          +preventsLazyLoading: false
          #perPage: 15
          +exists: true
          +wasRecentlyCreated: false
          #escapeWhenCastingToString: false
          #attributes: array:6 [
            "id" => 1551656
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "edition" => Illuminate\Database\Eloquent\Collection {#1054
              #items: array:1 [
                0 => App\Models\Edition {#1051
                  #connection: "mysql"
                  #table: "editions"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: false
                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
                  #perPage: 15
                  +exists: true
                  +wasRecentlyCreated: false
                  #escapeWhenCastingToString: false
                  #attributes: array:21 [
                    "id" => 5659
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "title" => "Решение 2 (rus)"
                    "field_order" => "3"
                    "field_publisher" => Illuminate\Database\Eloquent\Collection {#1039
                      #items: array:1 [
                        0 => App\Models\Term {#1049
                          #connection: "mysql"
                          #table: "terms"
                          #primaryKey: "id"
                          #keyType: "int"
                          +incrementing: false
                          #with: []
                          #withCount: []
                          +preventsLazyLoading: false
                          #perPage: 15
                          +exists: true
                          +wasRecentlyCreated: false
                          #escapeWhenCastingToString: false
                          #attributes: array:6 [
                            "id" => 7012
                            "created_at" => "2026-04-10 13:58:26"
                            "updated_at" => null
                            "name" => "Gemini 2.5 Pro"
                            "field_cases" => array:6 [
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                            "created_at" => "2026-04-10 13:58:26"
                            "updated_at" => null
                            "name" => "Gemini 2.5 Pro"
                            "field_cases" => array:6 [
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                              "field_prepositional_case" => null
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                            "field_translit" => "gemini 2.5 pro"
                          ]
                          #changes: []
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                          #attributeCastCache: []
                          #dateFormat: null
                          #appends: []
                          #dispatchesEvents: []
                          #observables: []
                          #relations: []
                          #touches: []
                          +timestamps: true
                          +usesUniqueIds: false
                          #hidden: []
                          #visible: []
                          #fillable: []
                          #guarded: array:1 [
                            0 => "*"
                          ]
                        }
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "field_content_type" => "free"
                    "field_content_mode" => "text"
                    "field_page_content_mode" => ""
                    "field_content_text_checked" => null
                    "field_page_content_text_checked" => "0"
                    "field_solution_author" => "Gemini 2.5 Pro"
                    "field_moderator" => "tolik"
                    "field_edition_type" => "solution"
                    "field_root_dir" => "2-"
                    "field_responsible" => Illuminate\Database\Eloquent\Collection {#1115
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_comment" => null
                    "field_similar_book" => Illuminate\Database\Eloquent\Collection {#1043
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_process_formula" => "katex"
                    "field_edition_group" => Illuminate\Database\Eloquent\Collection {#1109
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_content_source" => null
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                    "id" => 5659
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "title" => "Решение 2 (rus)"
                    "field_order" => "3"
                    "field_publisher" => Illuminate\Database\Eloquent\Collection {#1039}
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                    "field_content_mode" => "text"
                    "field_page_content_mode" => ""
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                    "field_page_content_text_checked" => "0"
                    "field_solution_author" => "Gemini 2.5 Pro"
                    "field_moderator" => "tolik"
                    "field_edition_type" => "solution"
                    "field_root_dir" => "2-"
                    "field_responsible" => Illuminate\Database\Eloquent\Collection {#1115}
                    "field_comment" => null
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                    "field_process_formula" => "katex"
                    "field_edition_group" => Illuminate\Database\Eloquent\Collection {#1109}
                    "field_content_source" => null
                  ]
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            "task" => array:2 [
              "refs" => "1119935"
              "type" => "task"
            ]
            "text" => "<p><strong>a)</strong> Для решения неравенства $sin x > 0$ воспользуемся единичной тригонометрической окружностью. Синус (ордината точки на окружности) положителен в первой и второй координатных четвертях. Это соответствует углам, принадлежащим интервалу $(0, \pi)$. Так как функция синуса периодическая с периодом $2\pi$, то к концам найденного интервала необходимо прибавить $2\pi k$, где $k$ — любое целое число ($k \in Z$). Таким образом, получаем общее решение в виде двойного неравенства.<br>$2\pi k < x < \pi + 2\pi k, k \in Z$.<br>Ответ: $x \in (2\pi k; \pi + 2\pi k), k \in Z$.</p><p><strong>б)</strong> Введем новую переменную $t = 3x$. Неравенство примет вид $sin t \ge 0$. Решением этого базового неравенства является множество значений $t$, при которых синус неотрицателен. Это соответствует углам в первой и второй четвертях, включая границы. С учетом периодичности, решение для $t$ записывается так: $2\pi k \le t \le \pi + 2\pi k, k \in Z$. Теперь вернемся к исходной переменной $x$, подставив $3x$ вместо $t$: $2\pi k \le 3x \le \pi + 2\pi k$. Чтобы найти $x$, разделим все части этого двойного неравенства на 3.<br>$\frac{2\pi k}{3} \le x \le \frac{\pi + 2\pi k}{3}$.<br>Ответ: $x \in [\frac{2\pi k}{3}; \frac{\pi}{3} + \frac{2\pi k}{3}], k \in Z$.</p><p><strong>в)</strong> Решим неравенство $sin\frac{x}{3} < 0$. Сделаем замену $t = \frac{x}{3}$. Получим простейшее неравенство $sin t < 0$. Функция синуса принимает отрицательные значения в третьей и четвертой координатных четвертях, что соответствует интервалу углов $(\pi, 2\pi)$. Учитывая периодичность, общее решение для $t$ имеет вид: $\pi + 2\pi k < t < 2\pi + 2\pi k, k \in Z$. Выполним обратную замену: $\pi + 2\pi k < \frac{x}{3} < 2\pi + 2\pi k$. Для того чтобы выразить $x$, умножим все части неравенства на 3.<br>$3(\pi + 2\pi k) < x < 3(2\pi + 2\pi k)$, что дает $3\pi + 6\pi k < x < 6\pi + 6\pi k$.<br>Ответ: $x \in (3\pi + 6\pi k; 6\pi + 6\pi k), k \in Z$.</p><p><strong>г)</strong> Чтобы решить неравенство $sin(x - \frac{\pi}{6}) \le 0$, введем замену переменной $t = x - \frac{\pi}{6}$. Неравенство примет вид $sin t \le 0$. Синус неположителен в третьей и четвертой четвертях, включая их границы. Этот промежуток можно записать как $[\pi, 2\pi]$ или, что удобнее для дальнейших вычислений, как $[-\pi, 0]$. С учетом периода $2\pi$, получаем: $-\pi + 2\pi k \le t \le 0 + 2\pi k, k \in Z$. Произведем обратную замену: $-\pi + 2\pi k \le x - \frac{\pi}{6} \le 2\pi k$. Чтобы найти $x$, прибавим $\frac{\pi}{6}$ ко всем частям двойного неравенства.<br>$-\pi + \frac{\pi}{6} + 2\pi k \le x \le \frac{\pi}{6} + 2\pi k$.<br>$-\frac{5\pi}{6} + 2\pi k \le x \le \frac{\pi}{6} + 2\pi k$.<br>Ответ: $x \in [-\frac{5\pi}{6} + 2\pi k; \frac{\pi}{6} + 2\pi k], k \in Z$.</p><p><strong>д)</strong> Решим неравенство $sin(\frac{5x}{6} - \frac{5\pi}{6}) \le 0$. Введем замену $t = \frac{5x}{6} - \frac{5\pi}{6}$. Неравенство сведется к $sin t \le 0$. Как и в предыдущем пункте, решением для $t$ является промежуток $-\pi + 2\pi k \le t \le 0 + 2\pi k, k \in Z$. Сделаем обратную замену.<br>$-\pi + 2\pi k \le \frac{5x}{6} - \frac{5\pi}{6} \le 2\pi k$.<br>Прибавим ко всем частям неравенства $\frac{5\pi}{6}$.<br>$-\pi + \frac{5\pi}{6} + 2\pi k \le \frac{5x}{6} \le \frac{5\pi}{6} + 2\pi k$.<br>$-\frac{\pi}{6} + 2\pi k \le \frac{5x}{6} \le \frac{5\pi}{6} + 2\pi k$.<br>Теперь умножим все части неравенства на $\frac{6}{5}$.<br>$\frac{6}{5}(-\frac{\pi}{6} + 2\pi k) \le x \le \frac{6}{5}(\frac{5\pi}{6} + 2\pi k)$.<br>$-\frac{\pi}{5} + \frac{12\pi k}{5} \le x \le \pi + \frac{12\pi k}{5}$.<br>Ответ: $x \in [-\frac{\pi}{5} + \frac{12\pi k}{5}; \pi + \frac{12\pi k}{5}], k \in Z$.</p>"
          ]
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            "id" => 1551656
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "edition" => Illuminate\Database\Eloquent\Collection {#1054}
            "task" => array:2 [
              "refs" => "1119935"
              "type" => "task"
            ]
            "text" => "<p><strong>a)</strong> Для решения неравенства $sin x > 0$ воспользуемся единичной тригонометрической окружностью. Синус (ордината точки на окружности) положителен в первой и второй координатных четвертях. Это соответствует углам, принадлежащим интервалу $(0, \pi)$. Так как функция синуса периодическая с периодом $2\pi$, то к концам найденного интервала необходимо прибавить $2\pi k$, где $k$ — любое целое число ($k \in Z$). Таким образом, получаем общее решение в виде двойного неравенства.<br>$2\pi k < x < \pi + 2\pi k, k \in Z$.<br>Ответ: $x \in (2\pi k; \pi + 2\pi k), k \in Z$.</p><p><strong>б)</strong> Введем новую переменную $t = 3x$. Неравенство примет вид $sin t \ge 0$. Решением этого базового неравенства является множество значений $t$, при которых синус неотрицателен. Это соответствует углам в первой и второй четвертях, включая границы. С учетом периодичности, решение для $t$ записывается так: $2\pi k \le t \le \pi + 2\pi k, k \in Z$. Теперь вернемся к исходной переменной $x$, подставив $3x$ вместо $t$: $2\pi k \le 3x \le \pi + 2\pi k$. Чтобы найти $x$, разделим все части этого двойного неравенства на 3.<br>$\frac{2\pi k}{3} \le x \le \frac{\pi + 2\pi k}{3}$.<br>Ответ: $x \in [\frac{2\pi k}{3}; \frac{\pi}{3} + \frac{2\pi k}{3}], k \in Z$.</p><p><strong>в)</strong> Решим неравенство $sin\frac{x}{3} < 0$. Сделаем замену $t = \frac{x}{3}$. Получим простейшее неравенство $sin t < 0$. Функция синуса принимает отрицательные значения в третьей и четвертой координатных четвертях, что соответствует интервалу углов $(\pi, 2\pi)$. Учитывая периодичность, общее решение для $t$ имеет вид: $\pi + 2\pi k < t < 2\pi + 2\pi k, k \in Z$. Выполним обратную замену: $\pi + 2\pi k < \frac{x}{3} < 2\pi + 2\pi k$. Для того чтобы выразить $x$, умножим все части неравенства на 3.<br>$3(\pi + 2\pi k) < x < 3(2\pi + 2\pi k)$, что дает $3\pi + 6\pi k < x < 6\pi + 6\pi k$.<br>Ответ: $x \in (3\pi + 6\pi k; 6\pi + 6\pi k), k \in Z$.</p><p><strong>г)</strong> Чтобы решить неравенство $sin(x - \frac{\pi}{6}) \le 0$, введем замену переменной $t = x - \frac{\pi}{6}$. Неравенство примет вид $sin t \le 0$. Синус неположителен в третьей и четвертой четвертях, включая их границы. Этот промежуток можно записать как $[\pi, 2\pi]$ или, что удобнее для дальнейших вычислений, как $[-\pi, 0]$. С учетом периода $2\pi$, получаем: $-\pi + 2\pi k \le t \le 0 + 2\pi k, k \in Z$. Произведем обратную замену: $-\pi + 2\pi k \le x - \frac{\pi}{6} \le 2\pi k$. Чтобы найти $x$, прибавим $\frac{\pi}{6}$ ко всем частям двойного неравенства.<br>$-\pi + \frac{\pi}{6} + 2\pi k \le x \le \frac{\pi}{6} + 2\pi k$.<br>$-\frac{5\pi}{6} + 2\pi k \le x \le \frac{\pi}{6} + 2\pi k$.<br>Ответ: $x \in [-\frac{5\pi}{6} + 2\pi k; \frac{\pi}{6} + 2\pi k], k \in Z$.</p><p><strong>д)</strong> Решим неравенство $sin(\frac{5x}{6} - \frac{5\pi}{6}) \le 0$. Введем замену $t = \frac{5x}{6} - \frac{5\pi}{6}$. Неравенство сведется к $sin t \le 0$. Как и в предыдущем пункте, решением для $t$ является промежуток $-\pi + 2\pi k \le t \le 0 + 2\pi k, k \in Z$. Сделаем обратную замену.<br>$-\pi + 2\pi k \le \frac{5x}{6} - \frac{5\pi}{6} \le 2\pi k$.<br>Прибавим ко всем частям неравенства $\frac{5\pi}{6}$.<br>$-\pi + \frac{5\pi}{6} + 2\pi k \le \frac{5x}{6} \le \frac{5\pi}{6} + 2\pi k$.<br>$-\frac{\pi}{6} + 2\pi k \le \frac{5x}{6} \le \frac{5\pi}{6} + 2\pi k$.<br>Теперь умножим все части неравенства на $\frac{6}{5}$.<br>$\frac{6}{5}(-\frac{\pi}{6} + 2\pi k) \le x \le \frac{6}{5}(\frac{5\pi}{6} + 2\pi k)$.<br>$-\frac{\pi}{5} + \frac{12\pi k}{5} \le x \le \pi + \frac{12\pi k}{5}$.<br>Ответ: $x \in [-\frac{\pi}{5} + \frac{12\pi k}{5}; \pi + \frac{12\pi k}{5}], k \in Z$.</p>"
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№1 (с. 161)
Условие. №1 (с. 161)
скриншот условия
Алгебра, 10 класс Учебник, авторы: Пак Олег Владимирович, Ардакулы Дархан, Ескендирова Елена Викторовна, издательство Алматыкітап баспасы, Алматы, 2019, Часть 1, страница 161, номер 1, Условие

Решите неравенства (1-3):

1.

a) $sin x > 0$;

б) $sin 3x \ge 0$;

в) $sin \frac{x}{3} < 0$;

г) $sin \left(x - \frac{\pi}{6}\right) \le 0$;

д) $sin \left(\frac{5x}{6} - \frac{5\pi}{6}\right) \le 0$.

Решение 2 (rus). №1 (с. 161)

a) Для решения неравенства $sin x > 0$ воспользуемся единичной тригонометрической окружностью. Синус (ордината точки на окружности) положителен в первой и второй координатных четвертях. Это соответствует углам, принадлежащим интервалу $(0, \pi)$. Так как функция синуса периодическая с периодом $2\pi$, то к концам найденного интервала необходимо прибавить $2\pi k$, где $k$ — любое целое число ($k \in Z$). Таким образом, получаем общее решение в виде двойного неравенства.
$2\pi k < x < \pi + 2\pi k, k \in Z$.
Ответ: $x \in (2\pi k; \pi + 2\pi k), k \in Z$.

б) Введем новую переменную $t = 3x$. Неравенство примет вид $sin t \ge 0$. Решением этого базового неравенства является множество значений $t$, при которых синус неотрицателен. Это соответствует углам в первой и второй четвертях, включая границы. С учетом периодичности, решение для $t$ записывается так: $2\pi k \le t \le \pi + 2\pi k, k \in Z$. Теперь вернемся к исходной переменной $x$, подставив $3x$ вместо $t$: $2\pi k \le 3x \le \pi + 2\pi k$. Чтобы найти $x$, разделим все части этого двойного неравенства на 3.
$\frac{2\pi k}{3} \le x \le \frac{\pi + 2\pi k}{3}$.
Ответ: $x \in [\frac{2\pi k}{3}; \frac{\pi}{3} + \frac{2\pi k}{3}], k \in Z$.

в) Решим неравенство $sin\frac{x}{3} < 0$. Сделаем замену $t = \frac{x}{3}$. Получим простейшее неравенство $sin t < 0$. Функция синуса принимает отрицательные значения в третьей и четвертой координатных четвертях, что соответствует интервалу углов $(\pi, 2\pi)$. Учитывая периодичность, общее решение для $t$ имеет вид: $\pi + 2\pi k < t < 2\pi + 2\pi k, k \in Z$. Выполним обратную замену: $\pi + 2\pi k < \frac{x}{3} < 2\pi + 2\pi k$. Для того чтобы выразить $x$, умножим все части неравенства на 3.
$3(\pi + 2\pi k) < x < 3(2\pi + 2\pi k)$, что дает $3\pi + 6\pi k < x < 6\pi + 6\pi k$.
Ответ: $x \in (3\pi + 6\pi k; 6\pi + 6\pi k), k \in Z$.

г) Чтобы решить неравенство $sin(x - \frac{\pi}{6}) \le 0$, введем замену переменной $t = x - \frac{\pi}{6}$. Неравенство примет вид $sin t \le 0$. Синус неположителен в третьей и четвертой четвертях, включая их границы. Этот промежуток можно записать как $[\pi, 2\pi]$ или, что удобнее для дальнейших вычислений, как $[-\pi, 0]$. С учетом периода $2\pi$, получаем: $-\pi + 2\pi k \le t \le 0 + 2\pi k, k \in Z$. Произведем обратную замену: $-\pi + 2\pi k \le x - \frac{\pi}{6} \le 2\pi k$. Чтобы найти $x$, прибавим $\frac{\pi}{6}$ ко всем частям двойного неравенства.
$-\pi + \frac{\pi}{6} + 2\pi k \le x \le \frac{\pi}{6} + 2\pi k$.
$-\frac{5\pi}{6} + 2\pi k \le x \le \frac{\pi}{6} + 2\pi k$.
Ответ: $x \in [-\frac{5\pi}{6} + 2\pi k; \frac{\pi}{6} + 2\pi k], k \in Z$.

д) Решим неравенство $sin(\frac{5x}{6} - \frac{5\pi}{6}) \le 0$. Введем замену $t = \frac{5x}{6} - \frac{5\pi}{6}$. Неравенство сведется к $sin t \le 0$. Как и в предыдущем пункте, решением для $t$ является промежуток $-\pi + 2\pi k \le t \le 0 + 2\pi k, k \in Z$. Сделаем обратную замену.
$-\pi + 2\pi k \le \frac{5x}{6} - \frac{5\pi}{6} \le 2\pi k$.
Прибавим ко всем частям неравенства $\frac{5\pi}{6}$.
$-\pi + \frac{5\pi}{6} + 2\pi k \le \frac{5x}{6} \le \frac{5\pi}{6} + 2\pi k$.
$-\frac{\pi}{6} + 2\pi k \le \frac{5x}{6} \le \frac{5\pi}{6} + 2\pi k$.
Теперь умножим все части неравенства на $\frac{6}{5}$.
$\frac{6}{5}(-\frac{\pi}{6} + 2\pi k) \le x \le \frac{6}{5}(\frac{5\pi}{6} + 2\pi k)$.
$-\frac{\pi}{5} + \frac{12\pi k}{5} \le x \le \pi + \frac{12\pi k}{5}$.
Ответ: $x \in [-\frac{\pi}{5} + \frac{12\pi k}{5}; \pi + \frac{12\pi k}{5}], k \in Z$.

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