Номер 2.43, страница 64 - гдз по геометрии 8 класс учебник Шыныбеков, Шыныбеков

Геометрия, 8 класс Учебник, авторы: Шыныбеков Абдухали Насырович, Шыныбеков Данияр Абдухалиевич, Жумабаев Ринат Нурланович, издательство Атамұра, Алматы, 2018

Авторы: Шыныбеков А. Н., Шыныбеков Д. А., Жумабаев Р. Н.

Тип: Учебник

Издательство: Атамұра

Год издания: 2018 - 2026

ISBN: 978-601-331-161-6

Рекомендовано Министерством образования и науки Республики Казахстан

Раздел 2. Соотношения между сторонами и углами прямоугольного треугольника. 2.2. Синус, тангенс и котангенс острого угла - номер 2.43, страница 64.

App\Models\Task {#1030 // resources/views/models/task/default.blade.php
  #connection: "mysql"
  #table: "tasks"
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  #attributes: array:24 [
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    "field_outside_task" => null
    "field_task_type" => Illuminate\Database\Eloquent\Collection {#1037
      #items: array:1 [
        0 => App\Models\Term {#1036
          #connection: "mysql"
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          #attributes: array:6 [
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        0 => App\Models\Branch {#1045
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            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1050
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                0 => App\Models\Term {#1047
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              #items: array:1 [
                0 => App\Models\Book {#1057
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                    "id" => 2592
                    "created_at" => "2026-04-10 13:58:26"
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                      #items: array:1 [
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                            "created_at" => "2026-04-10 13:58:26"
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                    "field_class" => Illuminate\Database\Eloquent\Collection {#1064
                      #items: array:1 [
                        0 => App\Models\Term {#1061
                          #connection: "mysql"
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                            "created_at" => "2026-04-10 13:58:26"
                            "updated_at" => null
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                        0 => App\Models\Term {#1071
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                          #connection: "mysql"
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                            "created_at" => "2026-04-10 13:58:26"
                            "updated_at" => null
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                          #original: array:10 [
                            "id" => 6671
                            "created_at" => "2026-04-10 13:58:26"
                            "updated_at" => null
                            "name" => "Учебник"
                            "field_book_type_foreign" => null
                            "field_cases" => array:6 [
                              "field_accusative_case" => "учебник"
                              "field_creative_case" => "учебником"
                              "field_dative_case" => "учебнику"
                              "field_genitive_case" => "учебника"
                              "field_nominative_case" => "учебник"
                              "field_prepositional_case" => "учебнике"
                            ]
                            "field_plural_form" => null
                            "field_short_name" => null
                            "field_short_name_foreign" => null
                            "field_translit" => "uchebnik"
                          ]
                          #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_country" => Illuminate\Database\Eloquent\Collection {#1068
                      #items: array:1 [
                        0 => App\Models\Term {#1073
                          #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" => 6994
                            "created_at" => "2026-04-10 13:58:26"
                            "updated_at" => null
                            "name" => "Казахстан"
                            "field_cases" => array:6 [
                              "field_accusative_case" => null
                              "field_creative_case" => null
                              "field_dative_case" => null
                              "field_genitive_case" => null
                              "field_nominative_case" => null
                              "field_prepositional_case" => null
                            ]
                            "field_translit" => "kazakhstan"
                          ]
                          #original: array:6 [
                            "id" => 6994
                            "created_at" => "2026-04-10 13:58:26"
                            "updated_at" => null
                            "name" => "Казахстан"
                            "field_cases" => array:6 [
                              "field_accusative_case" => null
                              "field_creative_case" => null
                              "field_dative_case" => null
                              "field_genitive_case" => null
                              "field_nominative_case" => null
                              "field_prepositional_case" => null
                            ]
                            "field_translit" => "kazakhstan"
                          ]
                          #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_city" => Illuminate\Database\Eloquent\Collection {#1066
                      #items: array:1 [
                        0 => App\Models\Term {#1069
                          #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" => 6995
                            "created_at" => "2026-04-10 13:58:26"
                            "updated_at" => null
                            "name" => "Алматы"
                            "field_cases" => array:6 [
                              "field_accusative_case" => null
                              "field_creative_case" => null
                              "field_dative_case" => null
                              "field_genitive_case" => null
                              "field_nominative_case" => null
                              "field_prepositional_case" => null
                            ]
                            "field_translit" => "almaty"
                          ]
                          #original: array:6 [
                            "id" => 6995
                            "created_at" => "2026-04-10 13:58:26"
                            "updated_at" => null
                            "name" => "Алматы"
                            "field_cases" => array:6 [
                              "field_accusative_case" => null
                              "field_creative_case" => null
                              "field_dative_case" => null
                              "field_genitive_case" => null
                              "field_nominative_case" => null
                              "field_prepositional_case" => null
                            ]
                            "field_translit" => "almaty"
                          ]
                          #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_series" => Illuminate\Database\Eloquent\Collection {#1067
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_umk" => Illuminate\Database\Eloquent\Collection {#1060
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_level_of_education" => Illuminate\Database\Eloquent\Collection {#1080
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_standart_of_education" => Illuminate\Database\Eloquent\Collection {#1081
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_publication_number" => null
                    "field_publication_type" => Illuminate\Database\Eloquent\Collection {#1082
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_under_the_edition" => Illuminate\Database\Eloquent\Collection {#1083
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_under_the_edition_degree" => null
                    "field_cover_description" => null
                    "field_publication_year" => "2018"
                    "field_publication_year_until" => null
                    "field_part" => ""
                    "field_part_writing" => ""
                    "field_second_foreign_language" => null
                    "field_for_whom" => "Учебник для 8 класса общеобразовательных школ"
                    "field_allowed" => "Рекомендовано Министерством образования и науки Республики Казахстан"
                    "field_reserve_field" => null
                    "field_link_to_source" => null
                    "field_tasks_count" => "538"
                    "field_priority" => "6"
                    "field_default_folder" => "/geometrija_08/Shynybekov-u17/"
                    "field_isbn" => "978-601-331-161-6"
                    "field_cover" => array:1 [
                      0 => "/media/geometrija_08/Shynybekov-u17/covers/cover1.webp?ts=1753258124"
                    ]
                    "field_cover_alts" => array:1 [
                      0 => ""
                    ]
                    "field_covers" => array:1 [
                      0 => array:4 [
                        "path" => "/media/geometrija_08/Shynybekov-u17/covers/cover1.webp?ts=1753258124"
                        "alt" => ""
                        "width" => "1632"
                        "height" => "2472"
                      ]
                    ]
                    "field_popular_book" => null
                    "field_recommended_books" => Illuminate\Database\Eloquent\Collection {#1084
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_new_book" => Illuminate\Database\Eloquent\Collection {#1085
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_old_book" => Illuminate\Database\Eloquent\Collection {#1086
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_url" => "/8-klass/geometrija/shynybekov-uchebnik"
                    "field_cover_color" => Illuminate\Database\Eloquent\Collection {#1087
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_metatags_title" => null
                    "field_metatags_description" => null
                    "field_h1" => null
                    "field_description_top" => null
                    "field_description_bottom" => null
                    "breadcrumbs" => array:3 [
                      "class" => 379
                      "subject" => 543
                      "class_subject" => 390
                    ]
                  ]
                  #original: array:50 [
                    "id" => 2592
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "field_tree_default_status" => "tasks"
                    "field_pages_status" => null
                    "field_subject" => Illuminate\Database\Eloquent\Collection {#1062}
                    "field_class" => Illuminate\Database\Eloquent\Collection {#1064}
                    "field_publisher" => Illuminate\Database\Eloquent\Collection {#1072}
                    "field_author" => Illuminate\Database\Eloquent\Collection {#1063}
                    "field_author_foreign" => Illuminate\Database\Eloquent\Collection {#1074}
                    "field_book_type" => Illuminate\Database\Eloquent\Collection {#1075}
                    "field_country" => Illuminate\Database\Eloquent\Collection {#1068}
                    "field_city" => Illuminate\Database\Eloquent\Collection {#1066}
                    "field_series" => Illuminate\Database\Eloquent\Collection {#1067}
                    "field_umk" => Illuminate\Database\Eloquent\Collection {#1060}
                    "field_level_of_education" => Illuminate\Database\Eloquent\Collection {#1080}
                    "field_standart_of_education" => Illuminate\Database\Eloquent\Collection {#1081}
                    "field_publication_number" => null
                    "field_publication_type" => Illuminate\Database\Eloquent\Collection {#1082}
                    "field_under_the_edition" => Illuminate\Database\Eloquent\Collection {#1083}
                    "field_under_the_edition_degree" => null
                    "field_cover_description" => null
                    "field_publication_year" => "2018"
                    "field_publication_year_until" => null
                    "field_part" => ""
                    "field_part_writing" => ""
                    "field_second_foreign_language" => null
                    "field_for_whom" => "Учебник для 8 класса общеобразовательных школ"
                    "field_allowed" => "Рекомендовано Министерством образования и науки Республики Казахстан"
                    "field_reserve_field" => null
                    "field_link_to_source" => null
                    "field_tasks_count" => "538"
                    "field_priority" => "6"
                    "field_default_folder" => "/geometrija_08/Shynybekov-u17/"
                    "field_isbn" => "978-601-331-161-6"
                    "field_cover" => array:1 [
                      0 => "/media/geometrija_08/Shynybekov-u17/covers/cover1.webp?ts=1753258124"
                    ]
                    "field_cover_alts" => array:1 [
                      0 => ""
                    ]
                    "field_covers" => array:1 [
                      0 => array:4 [
                        "path" => "/media/geometrija_08/Shynybekov-u17/covers/cover1.webp?ts=1753258124"
                        "alt" => ""
                        "width" => "1632"
                        "height" => "2472"
                      ]
                    ]
                    "field_popular_book" => null
                    "field_recommended_books" => Illuminate\Database\Eloquent\Collection {#1084}
                    "field_new_book" => Illuminate\Database\Eloquent\Collection {#1085}
                    "field_old_book" => Illuminate\Database\Eloquent\Collection {#1086}
                    "field_url" => "/8-klass/geometrija/shynybekov-uchebnik"
                    "field_cover_color" => Illuminate\Database\Eloquent\Collection {#1087}
                    "field_metatags_title" => null
                    "field_metatags_description" => null
                    "field_h1" => null
                    "field_description_top" => null
                    "field_description_bottom" => null
                    "breadcrumbs" => array:3 [
                      "class" => 379
                      "subject" => 543
                      "class_subject" => 390
                    ]
                  ]
                  #changes: []
                  #casts: []
                  #classCastCache: []
                  #attributeCastCache: []
                  #dateFormat: null
                  #appends: []
                  #dispatchesEvents: []
                  #observables: []
                  #relations: []
                  #touches: []
                  +timestamps: true
                  +usesUniqueIds: false
                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [
                    0 => "*"
                  ]
                }
              ]
              #escapeWhenCastingToString: false
            }
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1048
              #items: []
              #escapeWhenCastingToString: false
            }
          ]
          #original: array:24 [
            "id" => 1122381
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_display_title" => "Соотношения между сторонами и углами прямоугольного треугольника"
            "field_branch_order" => "2"
            "field_url" => null
            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1050}
            "field_page_start" => "52"
            "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 {#1058}
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1048}
          ]
          #changes: []
          #casts: []
          #classCastCache: []
          #attributeCastCache: []
          #dateFormat: null
          #appends: []
          #dispatchesEvents: []
          #observables: []
          #relations: []
          #touches: []
          +timestamps: true
          +usesUniqueIds: false
          #hidden: []
          #visible: []
          #fillable: []
          #guarded: array:1 [
            0 => "*"
          ]
        }
      ]
      #escapeWhenCastingToString: false
    }
    "parent_branches" => Illuminate\Database\Eloquent\Collection {#1110
      #items: array:2 [
        0 => App\Models\Branch {#1118
          #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" => 1122381
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_display_title" => "Соотношения между сторонами и углами прямоугольного треугольника"
            "field_branch_order" => "2"
            "field_url" => null
            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1119
              #items: array:1 [
                0 => App\Models\Term {#1047}
              ]
              #escapeWhenCastingToString: false
            }
            "field_page_start" => "52"
            "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 {#1120
              #items: array:1 [
                0 => App\Models\Book {#1057}
              ]
              #escapeWhenCastingToString: false
            }
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1121
              #items: []
              #escapeWhenCastingToString: false
            }
          ]
          #original: array:24 [
            "id" => 1122381
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_display_title" => "Соотношения между сторонами и углами прямоугольного треугольника"
            "field_branch_order" => "2"
            "field_url" => null
            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1119}
            "field_page_start" => "52"
            "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 {#1120}
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1121}
          ]
          #changes: []
          #casts: []
          #classCastCache: []
          #attributeCastCache: []
          #dateFormat: null
          #appends: []
          #dispatchesEvents: []
          #observables: []
          #relations: []
          #touches: []
          +timestamps: true
          +usesUniqueIds: false
          #hidden: []
          #visible: []
          #fillable: []
          #guarded: array:1 [
            0 => "*"
          ]
        }
        1 => App\Models\Branch {#1122
          #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" => 1122383
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_display_title" => "2.2. Синус, тангенс и котангенс острого угла"
            "field_branch_order" => null
            "field_url" => null
            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1123
              #items: []
              #escapeWhenCastingToString: false
            }
            "field_page_start" => "60"
            "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 {#1124
              #items: array:1 [
                0 => App\Models\Book {#1057}
              ]
              #escapeWhenCastingToString: false
            }
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1125
              #items: array:1 [
                0 => App\Models\Branch {#1045}
              ]
              #escapeWhenCastingToString: false
            }
          ]
          #original: array:24 [
            "id" => 1122383
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_display_title" => "2.2. Синус, тангенс и котангенс острого угла"
            "field_branch_order" => null
            "field_url" => null
            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1123}
            "field_page_start" => "60"
            "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 {#1124}
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1125}
          ]
          #changes: []
          #casts: []
          #classCastCache: []
          #attributeCastCache: []
          #dateFormat: null
          #appends: []
          #dispatchesEvents: []
          #observables: []
          #relations: []
          #touches: []
          +timestamps: true
          +usesUniqueIds: false
          #hidden: []
          #visible: []
          #fillable: []
          #guarded: array:1 [
            0 => "*"
          ]
        }
      ]
      #escapeWhenCastingToString: false
    }
    "content" => Illuminate\Database\Eloquent\Collection {#1038
      #items: array:4 [
        0 => App\Models\Element {#1099
          #connection: "mysql"
          #table: "elements"
          #primaryKey: "id"
          #keyType: "int"
          +incrementing: true
          #with: []
          #withCount: []
          +preventsLazyLoading: false
          #perPage: 15
          +exists: true
          +wasRecentlyCreated: false
          #escapeWhenCastingToString: false
          #attributes: array:7 [
            "id" => 1305111
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "edition" => Illuminate\Database\Eloquent\Collection {#1055
              #items: array:1 [
                0 => App\Models\Edition {#1090
                  #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" => 5006
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "title" => "Учебник rus"
                    "field_order" => "1"
                    "field_publisher" => Illuminate\Database\Eloquent\Collection {#1089
                      #items: array:1 [
                        0 => App\Models\Term {#1071}
                      ]
                      #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" => "0rus-"
                    "field_responsible" => Illuminate\Database\Eloquent\Collection {#1049
                      #items: []
                      #escapeWhenCastingToString: false
                    }
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            "text" => "<p><strong>2.43.</strong> Один катет прямоугольного треугольника равен $b$, а противолежащий ему угол – $\beta$. Выразите через $b$ и $\beta$ другой катет, гипотенузу и второй острый угол треугольника.</p>"
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            "edition" => Illuminate\Database\Eloquent\Collection {#1055}
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            "text" => "<p><strong>2.43.</strong> Один катет прямоугольного треугольника равен $b$, а противолежащий ему угол – $\beta$. Выразите через $b$ и $\beta$ другой катет, гипотенузу и второй острый угол треугольника.</p>"
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        1 => App\Models\Element {#1097
          #connection: "mysql"
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        2 => App\Models\Element {#1098
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            "text" => "<p>Пусть дан прямоугольный треугольник. Обозначим его катеты как $a$ и $b$, гипотенузу как $c$, а острые углы, противолежащие этим катетам, как $\alpha$ и $\beta$ соответственно. Прямой угол равен $90^\circ$.</p><p>По условию задачи, один катет равен $b$, а противолежащий ему угол — $\beta$. Требуется выразить через $b$ и $\beta$ другой катет ($a$), гипотенузу ($c$) и второй острый угол ($\alpha$).</p><p><strong>Другой катет</strong><br>В прямоугольном треугольнике отношение прилежащего катета к противолежащему равно котангенсу угла. Для угла $\beta$ прилежащим катетом является $a$, а противолежащим — $b$. $$ \cot(\beta) = \frac{a}{b} $$ Из этого соотношения выражаем катет $a$: $$ a = b \cdot \cot(\beta) $$ Также можно использовать тангенс: $\tan(\beta) = \frac{b}{a}$, откуда $a = \frac{b}{\tan(\beta)}$. Оба выражения эквивалентны.<br>Ответ: $b \cdot \cot(\beta)$.</p><p><strong>Гипотенуза</strong><br>В прямоугольном треугольнике отношение противолежащего катета к гипотенузе равно синусу угла. Для угла $\beta$ противолежащим катетом является $b$, а гипотенузой — $c$. $$ \sin(\beta) = \frac{b}{c} $$ Из этого соотношения выражаем гипотенузу $c$: $$ c = \frac{b}{\sin(\beta)} $$ Ответ: $\frac{b}{\sin(\beta)}$.</p><p><strong>Второй острый угол треугольника</strong><br>Сумма углов в любом треугольнике составляет $180^\circ$. Поскольку один угол прямой ($90^\circ$), сумма двух острых углов в прямоугольном треугольнике равна $90^\circ$. $$ \alpha + \beta = 90^\circ $$ Выражаем отсюда второй острый угол $\alpha$: $$ \alpha = 90^\circ - \beta $$ Ответ: $90^\circ - \beta$.</p>"
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            "text" => "<p>Пусть дан прямоугольный треугольник. Обозначим его катеты как $a$ и $b$, гипотенузу как $c$, а острые углы, противолежащие этим катетам, как $\alpha$ и $\beta$ соответственно. Прямой угол равен $90^\circ$.</p><p>По условию задачи, один катет равен $b$, а противолежащий ему угол — $\beta$. Требуется выразить через $b$ и $\beta$ другой катет ($a$), гипотенузу ($c$) и второй острый угол ($\alpha$).</p><p><strong>Другой катет</strong><br>В прямоугольном треугольнике отношение прилежащего катета к противолежащему равно котангенсу угла. Для угла $\beta$ прилежащим катетом является $a$, а противолежащим — $b$. $$ \cot(\beta) = \frac{a}{b} $$ Из этого соотношения выражаем катет $a$: $$ a = b \cdot \cot(\beta) $$ Также можно использовать тангенс: $\tan(\beta) = \frac{b}{a}$, откуда $a = \frac{b}{\tan(\beta)}$. Оба выражения эквивалентны.<br>Ответ: $b \cdot \cot(\beta)$.</p><p><strong>Гипотенуза</strong><br>В прямоугольном треугольнике отношение противолежащего катета к гипотенузе равно синусу угла. Для угла $\beta$ противолежащим катетом является $b$, а гипотенузой — $c$. $$ \sin(\beta) = \frac{b}{c} $$ Из этого соотношения выражаем гипотенузу $c$: $$ c = \frac{b}{\sin(\beta)} $$ Ответ: $\frac{b}{\sin(\beta)}$.</p><p><strong>Второй острый угол треугольника</strong><br>Сумма углов в любом треугольнике составляет $180^\circ$. Поскольку один угол прямой ($90^\circ$), сумма двух острых углов в прямоугольном треугольнике равна $90^\circ$. $$ \alpha + \beta = 90^\circ $$ Выражаем отсюда второй острый угол $\alpha$: $$ \alpha = 90^\circ - \beta $$ Ответ: $90^\circ - \beta$.</p>"
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№2.43 (с. 64)
Учебник rus. №2.43 (с. 64)
скриншот условия
Геометрия, 8 класс Учебник, авторы: Шыныбеков Абдухали Насырович, Шыныбеков Данияр Абдухалиевич, Жумабаев Ринат Нурланович, издательство Атамұра, Алматы, 2018, страница 64, номер 2.43, Учебник rus

2.43. Один катет прямоугольного треугольника равен $b$, а противолежащий ему угол – $\beta$. Выразите через $b$ и $\beta$ другой катет, гипотенузу и второй острый угол треугольника.

Учебник kz. №2.43 (с. 64)
Геометрия, 8 класс Учебник, авторы: Шыныбеков Абдухали Насырович, Шыныбеков Данияр Абдухалиевич, Жумабаев Ринат Нурланович, издательство Атамұра, Алматы, 2018, страница 64, номер 2.43, Учебник kz
Решение. №2.43 (с. 64)
Геометрия, 8 класс Учебник, авторы: Шыныбеков Абдухали Насырович, Шыныбеков Данияр Абдухалиевич, Жумабаев Ринат Нурланович, издательство Атамұра, Алматы, 2018, страница 64, номер 2.43, Решение
Решение 2 rus. №2.43 (с. 64)

Пусть дан прямоугольный треугольник. Обозначим его катеты как $a$ и $b$, гипотенузу как $c$, а острые углы, противолежащие этим катетам, как $\alpha$ и $\beta$ соответственно. Прямой угол равен $90^\circ$.

По условию задачи, один катет равен $b$, а противолежащий ему угол — $\beta$. Требуется выразить через $b$ и $\beta$ другой катет ($a$), гипотенузу ($c$) и второй острый угол ($\alpha$).

Другой катет
В прямоугольном треугольнике отношение прилежащего катета к противолежащему равно котангенсу угла. Для угла $\beta$ прилежащим катетом является $a$, а противолежащим — $b$. $$ \cot(\beta) = \frac{a}{b} $$ Из этого соотношения выражаем катет $a$: $$ a = b \cdot \cot(\beta) $$ Также можно использовать тангенс: $\tan(\beta) = \frac{b}{a}$, откуда $a = \frac{b}{\tan(\beta)}$. Оба выражения эквивалентны.
Ответ: $b \cdot \cot(\beta)$.

Гипотенуза
В прямоугольном треугольнике отношение противолежащего катета к гипотенузе равно синусу угла. Для угла $\beta$ противолежащим катетом является $b$, а гипотенузой — $c$. $$ \sin(\beta) = \frac{b}{c} $$ Из этого соотношения выражаем гипотенузу $c$: $$ c = \frac{b}{\sin(\beta)} $$ Ответ: $\frac{b}{\sin(\beta)}$.

Второй острый угол треугольника
Сумма углов в любом треугольнике составляет $180^\circ$. Поскольку один угол прямой ($90^\circ$), сумма двух острых углов в прямоугольном треугольнике равна $90^\circ$. $$ \alpha + \beta = 90^\circ $$ Выражаем отсюда второй острый угол $\alpha$: $$ \alpha = 90^\circ - \beta $$ Ответ: $90^\circ - \beta$.

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