Номер 11, страница 115, 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 2. Тригонометрические функции. Параграф 4. Преобразования выражений, содержащих обратные тригонометрические функции. Задачи - номер 11, страница 115.

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                            "field_translit" => "uchebnik"
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                            "created_at" => "2026-04-10 13:58:26"
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                            0 => "*"
                          ]
                        }
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "field_country" => Illuminate\Database\Eloquent\Collection {#1063
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                        0 => App\Models\Term {#1064
                          #connection: "mysql"
                          #table: "terms"
                          #primaryKey: "id"
                          #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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                              "field_nominative_case" => null
                              "field_prepositional_case" => null
                            ]
                            "field_translit" => "kazakhstan"
                          ]
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                            "id" => 6994
                            "created_at" => "2026-04-10 13:58:26"
                            "updated_at" => null
                            "name" => "Казахстан"
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                              "field_nominative_case" => null
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                            ]
                            "field_translit" => "kazakhstan"
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                          #dateFormat: null
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                          #dispatchesEvents: []
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                          ]
                        }
                      ]
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                    }
                    "field_city" => Illuminate\Database\Eloquent\Collection {#1065
                      #items: array:1 [
                        0 => App\Models\Term {#1066
                          #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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                          #escapeWhenCastingToString: false
                          #attributes: array:6 [
                            "id" => 6995
                            "created_at" => "2026-04-10 13:58:26"
                            "updated_at" => null
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                              "field_genitive_case" => null
                              "field_nominative_case" => null
                              "field_prepositional_case" => null
                            ]
                            "field_translit" => "almaty"
                          ]
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                            "created_at" => "2026-04-10 13:58:26"
                            "updated_at" => null
                            "name" => "Алматы"
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                            ]
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                          #visible: []
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                          ]
                        }
                      ]
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                    }
                    "field_series" => Illuminate\Database\Eloquent\Collection {#1067
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_umk" => Illuminate\Database\Eloquent\Collection {#1068
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_level_of_education" => Illuminate\Database\Eloquent\Collection {#1069
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_standart_of_education" => Illuminate\Database\Eloquent\Collection {#1070
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_publication_number" => null
                    "field_publication_type" => Illuminate\Database\Eloquent\Collection {#1071
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_under_the_edition" => Illuminate\Database\Eloquent\Collection {#1072
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_under_the_edition_degree" => null
                    "field_cover_description" => null
                    "field_publication_year" => "2019"
                    "field_publication_year_until" => null
                    "field_part" => "1, 2"
                    "field_part_writing" => "Часть"
                    "field_second_foreign_language" => null
                    "field_for_whom" => "Учебник для учащихся 10 класса общеобразовательной школы общественно-гуманитарного направления"
                    "field_allowed" => "Рекомендовано Министерством образования и науки Республики Казахстан"
                    "field_reserve_field" => null
                    "field_link_to_source" => null
                    "field_tasks_count" => "1063"
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                    "field_default_folder" => "/algebra_10/baspasy-u19/"
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                    "field_cover" => array:1 [
                      0 => "/media/algebra_10/baspasy-u19/covers/cover1.webp?ts=1752152865"
                    ]
                    "field_cover_alts" => array:1 [
                      0 => ""
                    ]
                    "field_covers" => array:1 [
                      0 => array:4 [
                        "path" => "/media/algebra_10/baspasy-u19/covers/cover1.webp?ts=1752152865"
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                        "width" => "1940"
                        "height" => "2895"
                      ]
                    ]
                    "field_popular_book" => null
                    "field_recommended_books" => Illuminate\Database\Eloquent\Collection {#1073
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                      #escapeWhenCastingToString: false
                    }
                    "field_new_book" => Illuminate\Database\Eloquent\Collection {#1074
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                      #escapeWhenCastingToString: false
                    }
                    "field_old_book" => Illuminate\Database\Eloquent\Collection {#1075
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                      #escapeWhenCastingToString: false
                    }
                    "field_url" => "/10-klass/algebra/baspasy-pak-uchebnik"
                    "field_cover_color" => Illuminate\Database\Eloquent\Collection {#1076
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                    }
                    "field_metatags_title" => null
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                    ]
                  ]
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                    "field_subject" => Illuminate\Database\Eloquent\Collection {#1051}
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                    "field_author_foreign" => Illuminate\Database\Eloquent\Collection {#1060}
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                    "field_series" => Illuminate\Database\Eloquent\Collection {#1067}
                    "field_umk" => Illuminate\Database\Eloquent\Collection {#1068}
                    "field_level_of_education" => Illuminate\Database\Eloquent\Collection {#1069}
                    "field_standart_of_education" => Illuminate\Database\Eloquent\Collection {#1070}
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                    "field_publication_type" => Illuminate\Database\Eloquent\Collection {#1071}
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                    "field_reserve_field" => null
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                    "field_cover" => array:1 [
                      0 => "/media/algebra_10/baspasy-u19/covers/cover1.webp?ts=1752152865"
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                    "field_cover_alts" => array:1 [
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                    "field_popular_book" => null
                    "field_recommended_books" => Illuminate\Database\Eloquent\Collection {#1073}
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                    "field_url" => "/10-klass/algebra/baspasy-pak-uchebnik"
                    "field_cover_color" => Illuminate\Database\Eloquent\Collection {#1076}
                    "field_metatags_title" => null
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                    "breadcrumbs" => array:3 [
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                  ]
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                    0 => "*"
                  ]
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              ]
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            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1077
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            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1050}
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              0 => array:4 [
                "path" => "/media/algebra_10/baspasy-u19/covers/cover1.webp?ts=1752152865"
                "alt" => ""
                "width" => "1940"
                "height" => "2895"
              ]
            ]
            "book" => Illuminate\Database\Eloquent\Collection {#1079}
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1077}
          ]
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      ]
      #escapeWhenCastingToString: false
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    "parent_branches" => Illuminate\Database\Eloquent\Collection {#1107
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        0 => App\Models\Branch {#1117
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          #table: "branches"
          #primaryKey: "id"
          #keyType: "int"
          +incrementing: true
          #with: []
          #withCount: []
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          #perPage: 15
          +exists: true
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          #escapeWhenCastingToString: false
          #attributes: array:24 [
            "id" => 1119328
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_display_title" => null
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            "field_url" => null
            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1118
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                0 => App\Models\Term {#1047}
              ]
              #escapeWhenCastingToString: false
            }
            "field_page_start" => "6"
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            "field_branch_expanded" => "0"
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            "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" => array:1 [
              0 => "/media/algebra_10/baspasy-u19/covers/cover1.webp?ts=1752152865"
            ]
            "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 {#1119
              #items: array:1 [
                0 => App\Models\Book {#1049}
              ]
              #escapeWhenCastingToString: false
            }
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1120
              #items: []
              #escapeWhenCastingToString: false
            }
          ]
          #original: array:24 [
            "id" => 1119328
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_display_title" => null
            "field_branch_order" => "1"
            "field_url" => null
            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1118}
            "field_page_start" => "6"
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            "field_display_branch_in_title" => "1"
            "field_display_task_interval" => "0"
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              0 => array:4 [
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                "height" => "2895"
              ]
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            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1120}
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          #attributeCastCache: []
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          #visible: []
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          #guarded: array:1 [
            0 => "*"
          ]
        }
        1 => App\Models\Branch {#1121
          #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" => 1119358
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_display_title" => "Тригонометрические функции"
            "field_branch_order" => "2"
            "field_url" => null
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              #items: array:1 [
                0 => App\Models\Term {#1122
                  #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" => 29
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "name" => "Глава"
                    "field_cases" => array:6 [
                      "field_accusative_case" => "Главу"
                      "field_creative_case" => "Главой"
                      "field_dative_case" => "Главе"
                      "field_genitive_case" => "Главы"
                      "field_nominative_case" => "Глава"
                      "field_prepositional_case" => "Главе"
                    ]
                    "field_page_check_not_needed" => null
                    "field_short_name" => null
                  ]
                  #original: array:7 [
                    "id" => 29
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "name" => "Глава"
                    "field_cases" => array:6 [
                      "field_accusative_case" => "Главу"
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                      "field_genitive_case" => "Главы"
                      "field_nominative_case" => "Глава"
                      "field_prepositional_case" => "Главе"
                    ]
                    "field_page_check_not_needed" => null
                    "field_short_name" => null
                  ]
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                    0 => "*"
                  ]
                }
              ]
              #escapeWhenCastingToString: false
            }
            "field_page_start" => "71"
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            "field_metatags_description" => null
            "field_h1" => null
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            "field_branch_covers" => []
            "book" => Illuminate\Database\Eloquent\Collection {#1124
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                0 => App\Models\Book {#1049}
              ]
              #escapeWhenCastingToString: false
            }
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1123
              #items: array:1 [
                0 => App\Models\Branch {#1045}
              ]
              #escapeWhenCastingToString: false
            }
          ]
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            "field_branch_order" => "2"
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            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1125}
            "field_page_start" => "71"
            "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 {#1123}
          ]
          #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 {#1126
          #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" => 1119378
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_display_title" => "Преобразования выражений, содержащих обратные тригонометрические функции"
            "field_branch_order" => "4"
            "field_url" => null
            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1130
              #items: array:1 [
                0 => App\Models\Term {#1127
                  #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" => "111"
            "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 {#1129
              #items: array:1 [
                0 => App\Models\Book {#1049}
              ]
              #escapeWhenCastingToString: false
            }
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1138
              #items: array:1 [
                0 => App\Models\Branch {#1137
                  #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" => 1119358
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "field_display_title" => "Тригонометрические функции"
                    "field_branch_order" => "2"
                    "field_url" => null
                    "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1139
                      #items: array:1 [
                        0 => App\Models\Term {#1122}
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "field_page_start" => "71"
                    "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 {#1140
                      #items: array:1 [
                        0 => App\Models\Book {#1049}
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "branch_parent" => Illuminate\Database\Eloquent\Collection {#1141
                      #items: array:1 [
                        0 => App\Models\Branch {#1045}
                      ]
                      #escapeWhenCastingToString: false
                    }
                  ]
                  #original: array:24 [
                    "id" => 1119358
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "field_display_title" => "Тригонометрические функции"
                    "field_branch_order" => "2"
                    "field_url" => null
                    "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1139}
                    "field_page_start" => "71"
                    "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 {#1140}
                    "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 => "*"
                  ]
                }
              ]
              #escapeWhenCastingToString: false
            }
          ]
          #original: array:24 [
            "id" => 1119378
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_display_title" => "Преобразования выражений, содержащих обратные тригонометрические функции"
            "field_branch_order" => "4"
            "field_url" => null
            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1130}
            "field_page_start" => "111"
            "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 {#1129}
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1138}
          ]
          #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 {#1131
          #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" => 1119379
            "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 {#1128
              #items: []
              #escapeWhenCastingToString: false
            }
            "field_page_start" => "112"
            "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 {#1134
              #items: array:1 [
                0 => App\Models\Book {#1049}
              ]
              #escapeWhenCastingToString: false
            }
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1147
              #items: array:1 [
                0 => App\Models\Branch {#1146
                  #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" => 1119378
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "field_display_title" => "Преобразования выражений, содержащих обратные тригонометрические функции"
                    "field_branch_order" => "4"
                    "field_url" => null
                    "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1148
                      #items: array:1 [
                        0 => App\Models\Term {#1127}
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "field_page_start" => "111"
                    "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 {#1149
                      #items: array:1 [
                        0 => App\Models\Book {#1049}
                      ]
                      #escapeWhenCastingToString: false
                    }
                    "branch_parent" => Illuminate\Database\Eloquent\Collection {#1150
                      #items: array:1 [
                        0 => App\Models\Branch {#1137}
                      ]
                      #escapeWhenCastingToString: false
                    }
                  ]
                  #original: array:24 [
                    "id" => 1119378
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "field_display_title" => "Преобразования выражений, содержащих обратные тригонометрические функции"
                    "field_branch_order" => "4"
                    "field_url" => null
                    "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1148}
                    "field_page_start" => "111"
                    "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 {#1149}
                    "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 => "*"
                  ]
                }
              ]
              #escapeWhenCastingToString: false
            }
          ]
          #original: array:24 [
            "id" => 1119379
            "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 {#1128}
            "field_page_start" => "112"
            "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 {#1134}
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1147}
          ]
          #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:2 [
        0 => App\Models\Element {#1098
          #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" => 1300461
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "edition" => Illuminate\Database\Eloquent\Collection {#1089
              #items: array:1 [
                0 => App\Models\Edition {#1088
                  #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" => 4962
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "title" => "Условие"
                    "field_order" => "1"
                    "field_publisher" => Illuminate\Database\Eloquent\Collection {#1043
                      #items: array:1 [
                        0 => App\Models\Term {#1080
                          #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" => 7006
                            "created_at" => "2026-04-10 13:58:26"
                            "updated_at" => null
                            "name" => "Алматыкітап баспасы"
                            "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" => "almatykitap baspasy"
                          ]
                          #original: array:6 [
                            "id" => 7006
                            "created_at" => "2026-04-10 13:58:26"
                            "updated_at" => null
                            "name" => "Алматыкітап баспасы"
                            "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" => "almatykitap baspasy"
                          ]
                          #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_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 {#1082
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_comment" => null
                    "field_similar_book" => Illuminate\Database\Eloquent\Collection {#1086
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_process_formula" => "katex"
                    "field_edition_group" => Illuminate\Database\Eloquent\Collection {#1087
                      #items: []
                      #escapeWhenCastingToString: false
                    }
                    "field_content_source" => null
                  ]
                  #original: 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 {#1043}
                    "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 {#1082}
                    "field_comment" => null
                    "field_similar_book" => Illuminate\Database\Eloquent\Collection {#1086}
                    "field_process_formula" => "katex"
                    "field_edition_group" => Illuminate\Database\Eloquent\Collection {#1087}
                    "field_content_source" => null
                  ]
                  #changes: []
                  #casts: []
                  #classCastCache: []
                  #attributeCastCache: []
                  #dateFormat: null
                  #appends: []
                  #dispatchesEvents: []
                  #observables: []
                  #relations: []
                  #touches: []
                  +timestamps: true
                  +usesUniqueIds: false
                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [
                    0 => "*"
                  ]
                }
              ]
              #escapeWhenCastingToString: false
            }
            "task" => array:2 [
              "refs" => "1119776"
              "type" => "task"
            ]
            "text" => "<p><strong>11. (3)</strong> <strong>а)</strong> Вычислите значение выражения $\cos\left(2\arcsin\frac{1}{3}\right)$.</p><p><strong>б)</strong> Докажите, что если $|a| \le 1$, то $\cos(2\arcsin a) = 1 - 2a^2$.</p><p><strong>в)</strong> Пользуясь формулой, доказанной в пункте б), определите $\cos\left(2\arcsin\frac{2}{\sqrt{5}+\sqrt{7}}\right)$.</p>"
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            "edition" => Illuminate\Database\Eloquent\Collection {#1089}
            "task" => array:2 [
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            "text" => "<p><strong>11. (3)</strong> <strong>а)</strong> Вычислите значение выражения $\cos\left(2\arcsin\frac{1}{3}\right)$.</p><p><strong>б)</strong> Докажите, что если $|a| \le 1$, то $\cos(2\arcsin a) = 1 - 2a^2$.</p><p><strong>в)</strong> Пользуясь формулой, доказанной в пункте б), определите $\cos\left(2\arcsin\frac{2}{\sqrt{5}+\sqrt{7}}\right)$.</p>"
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            "text" => "<p><strong>а)</strong></p><p>Для вычисления значения выражения воспользуемся формулой косинуса двойного угла: $\cos(2\alpha) = 1 - 2\sin^2(\alpha)$.</p><p>Пусть $\alpha = \arcsin\frac{1}{3}$. По определению арксинуса, это означает, что $\sin(\alpha) = \frac{1}{3}$.</p><p>Подставим это значение в формулу:</p><p>$\cos(2\arcsin\frac{1}{3}) = 1 - 2\sin^2(\arcsin\frac{1}{3}) = 1 - 2 \cdot (\sin(\arcsin\frac{1}{3}))^2$.</p><p>Так как $\sin(\arcsin x) = x$, получаем:</p><p>$1 - 2 \cdot (\frac{1}{3})^2 = 1 - 2 \cdot \frac{1}{9} = 1 - \frac{2}{9} = \frac{9-2}{9} = \frac{7}{9}$.</p><p><strong>Ответ:</strong> $\frac{7}{9}$.</p><p><strong>б)</strong></p><p>Требуется доказать, что если $|a| \le 1$, то $\cos(2\arcsin a) = 1 - 2a^2$.</p><p>Пусть $\alpha = \arcsin a$. Условие $|a| \le 1$ — это область определения функции арксинус, поэтому такое $\alpha$ существует и принадлежит отрезку $[-\frac{\pi}{2}, \frac{\pi}{2}]$.</p><p>По определению арксинуса, $\sin(\alpha) = \sin(\arcsin a) = a$.</p><p>Используем тригонометрическую формулу для косинуса двойного угла: $\cos(2\alpha) = 1 - 2\sin^2(\alpha)$.</p><p>Подставим $\alpha = \arcsin a$ и, соответственно, $\sin(\alpha) = a$ в эту формулу:</p><p>$\cos(2\arcsin a) = 1 - 2(\sin(\arcsin a))^2 = 1 - 2a^2$.</p><p>Что и требовалось доказать.</p><p><strong>Ответ:</strong> Утверждение доказано.</p><p><strong>в)</strong></p><p>Для нахождения значения выражения $\cos(2\arcsin\frac{2}{\sqrt{5+\sqrt{7}}})$ воспользуемся формулой, доказанной в пункте б): $\cos(2\arcsin a) = 1 - 2a^2$.</p><p>В данном случае, $a = \frac{2}{\sqrt{5+\sqrt{7}}}$.</p><p>Сначала убедимся, что $|a| \le 1$. Для этого достаточно проверить, что $a^2 \le 1$.</p><p>$a^2 = (\frac{2}{\sqrt{5+\sqrt{7}}})^2 = \frac{4}{5+\sqrt{7}}$.</p><p>Поскольку $\sqrt{7} > 0$, то $5+\sqrt{7} > 5 > 4$. Значит, знаменатель больше числителя, и $a^2 < 1$. Следовательно, $|a| < 1$, и мы можем применить формулу.</p><p>Применяем формулу:</p><p>$\cos(2\arcsin\frac{2}{\sqrt{5+\sqrt{7}}}) = 1 - 2 \cdot (\frac{2}{\sqrt{5+\sqrt{7}}})^2 = 1 - 2 \cdot \frac{4}{5+\sqrt{7}} = 1 - \frac{8}{5+\sqrt{7}}$.</p><p>Приведем выражение к общему знаменателю:</p><p>$1 - \frac{8}{5+\sqrt{7}} = \frac{5+\sqrt{7}-8}{5+\sqrt{7}} = \frac{\sqrt{7}-3}{5+\sqrt{7}}$.</p><p>Чтобы упростить результат, избавимся от иррациональности в знаменателе, умножив числитель и знаменатель на сопряженное выражение $5-\sqrt{7}$:</p><p>$\frac{\sqrt{7}-3}{5+\sqrt{7}} \cdot \frac{5-\sqrt{7}}{5-\sqrt{7}} = \frac{(\sqrt{7}-3)(5-\sqrt{7})}{(5+\sqrt{7})(5-\sqrt{7})} = \frac{5\sqrt{7} - (\sqrt{7})^2 - 15 + 3\sqrt{7}}{5^2 - (\sqrt{7})^2}$.</p><p>$\frac{5\sqrt{7} - 7 - 15 + 3\sqrt{7}}{25 - 7} = \frac{8\sqrt{7} - 22}{18}$.</p><p>Сократим дробь на 2:</p><p>$\frac{2(4\sqrt{7} - 11)}{18} = \frac{4\sqrt{7} - 11}{9}$.</p><p><strong>Ответ:</strong> $\frac{4\sqrt{7} - 11}{9}$.</p>"
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            "text" => "<p><strong>а)</strong></p><p>Для вычисления значения выражения воспользуемся формулой косинуса двойного угла: $\cos(2\alpha) = 1 - 2\sin^2(\alpha)$.</p><p>Пусть $\alpha = \arcsin\frac{1}{3}$. По определению арксинуса, это означает, что $\sin(\alpha) = \frac{1}{3}$.</p><p>Подставим это значение в формулу:</p><p>$\cos(2\arcsin\frac{1}{3}) = 1 - 2\sin^2(\arcsin\frac{1}{3}) = 1 - 2 \cdot (\sin(\arcsin\frac{1}{3}))^2$.</p><p>Так как $\sin(\arcsin x) = x$, получаем:</p><p>$1 - 2 \cdot (\frac{1}{3})^2 = 1 - 2 \cdot \frac{1}{9} = 1 - \frac{2}{9} = \frac{9-2}{9} = \frac{7}{9}$.</p><p><strong>Ответ:</strong> $\frac{7}{9}$.</p><p><strong>б)</strong></p><p>Требуется доказать, что если $|a| \le 1$, то $\cos(2\arcsin a) = 1 - 2a^2$.</p><p>Пусть $\alpha = \arcsin a$. Условие $|a| \le 1$ — это область определения функции арксинус, поэтому такое $\alpha$ существует и принадлежит отрезку $[-\frac{\pi}{2}, \frac{\pi}{2}]$.</p><p>По определению арксинуса, $\sin(\alpha) = \sin(\arcsin a) = a$.</p><p>Используем тригонометрическую формулу для косинуса двойного угла: $\cos(2\alpha) = 1 - 2\sin^2(\alpha)$.</p><p>Подставим $\alpha = \arcsin a$ и, соответственно, $\sin(\alpha) = a$ в эту формулу:</p><p>$\cos(2\arcsin a) = 1 - 2(\sin(\arcsin a))^2 = 1 - 2a^2$.</p><p>Что и требовалось доказать.</p><p><strong>Ответ:</strong> Утверждение доказано.</p><p><strong>в)</strong></p><p>Для нахождения значения выражения $\cos(2\arcsin\frac{2}{\sqrt{5+\sqrt{7}}})$ воспользуемся формулой, доказанной в пункте б): $\cos(2\arcsin a) = 1 - 2a^2$.</p><p>В данном случае, $a = \frac{2}{\sqrt{5+\sqrt{7}}}$.</p><p>Сначала убедимся, что $|a| \le 1$. Для этого достаточно проверить, что $a^2 \le 1$.</p><p>$a^2 = (\frac{2}{\sqrt{5+\sqrt{7}}})^2 = \frac{4}{5+\sqrt{7}}$.</p><p>Поскольку $\sqrt{7} > 0$, то $5+\sqrt{7} > 5 > 4$. Значит, знаменатель больше числителя, и $a^2 < 1$. Следовательно, $|a| < 1$, и мы можем применить формулу.</p><p>Применяем формулу:</p><p>$\cos(2\arcsin\frac{2}{\sqrt{5+\sqrt{7}}}) = 1 - 2 \cdot (\frac{2}{\sqrt{5+\sqrt{7}}})^2 = 1 - 2 \cdot \frac{4}{5+\sqrt{7}} = 1 - \frac{8}{5+\sqrt{7}}$.</p><p>Приведем выражение к общему знаменателю:</p><p>$1 - \frac{8}{5+\sqrt{7}} = \frac{5+\sqrt{7}-8}{5+\sqrt{7}} = \frac{\sqrt{7}-3}{5+\sqrt{7}}$.</p><p>Чтобы упростить результат, избавимся от иррациональности в знаменателе, умножив числитель и знаменатель на сопряженное выражение $5-\sqrt{7}$:</p><p>$\frac{\sqrt{7}-3}{5+\sqrt{7}} \cdot \frac{5-\sqrt{7}}{5-\sqrt{7}} = \frac{(\sqrt{7}-3)(5-\sqrt{7})}{(5+\sqrt{7})(5-\sqrt{7})} = \frac{5\sqrt{7} - (\sqrt{7})^2 - 15 + 3\sqrt{7}}{5^2 - (\sqrt{7})^2}$.</p><p>$\frac{5\sqrt{7} - 7 - 15 + 3\sqrt{7}}{25 - 7} = \frac{8\sqrt{7} - 22}{18}$.</p><p>Сократим дробь на 2:</p><p>$\frac{2(4\sqrt{7} - 11)}{18} = \frac{4\sqrt{7} - 11}{9}$.</p><p><strong>Ответ:</strong> $\frac{4\sqrt{7} - 11}{9}$.</p>"
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№11 (с. 115)
Условие. №11 (с. 115)
скриншот условия
Алгебра, 10 класс Учебник, авторы: Пак Олег Владимирович, Ардакулы Дархан, Ескендирова Елена Викторовна, издательство Алматыкітап баспасы, Алматы, 2019, Часть 1, страница 115, номер 11, Условие

11. (3) а) Вычислите значение выражения $\cos\left(2\arcsin\frac{1}{3}\right)$.

б) Докажите, что если $|a| \le 1$, то $\cos(2\arcsin a) = 1 - 2a^2$.

в) Пользуясь формулой, доказанной в пункте б), определите $\cos\left(2\arcsin\frac{2}{\sqrt{5}+\sqrt{7}}\right)$.

Решение 2 (rus). №11 (с. 115)

а)

Для вычисления значения выражения воспользуемся формулой косинуса двойного угла: $\cos(2\alpha) = 1 - 2\sin^2(\alpha)$.

Пусть $\alpha = \arcsin\frac{1}{3}$. По определению арксинуса, это означает, что $\sin(\alpha) = \frac{1}{3}$.

Подставим это значение в формулу:

$\cos(2\arcsin\frac{1}{3}) = 1 - 2\sin^2(\arcsin\frac{1}{3}) = 1 - 2 \cdot (\sin(\arcsin\frac{1}{3}))^2$.

Так как $\sin(\arcsin x) = x$, получаем:

$1 - 2 \cdot (\frac{1}{3})^2 = 1 - 2 \cdot \frac{1}{9} = 1 - \frac{2}{9} = \frac{9-2}{9} = \frac{7}{9}$.

Ответ: $\frac{7}{9}$.

б)

Требуется доказать, что если $|a| \le 1$, то $\cos(2\arcsin a) = 1 - 2a^2$.

Пусть $\alpha = \arcsin a$. Условие $|a| \le 1$ — это область определения функции арксинус, поэтому такое $\alpha$ существует и принадлежит отрезку $[-\frac{\pi}{2}, \frac{\pi}{2}]$.

По определению арксинуса, $\sin(\alpha) = \sin(\arcsin a) = a$.

Используем тригонометрическую формулу для косинуса двойного угла: $\cos(2\alpha) = 1 - 2\sin^2(\alpha)$.

Подставим $\alpha = \arcsin a$ и, соответственно, $\sin(\alpha) = a$ в эту формулу:

$\cos(2\arcsin a) = 1 - 2(\sin(\arcsin a))^2 = 1 - 2a^2$.

Что и требовалось доказать.

Ответ: Утверждение доказано.

в)

Для нахождения значения выражения $\cos(2\arcsin\frac{2}{\sqrt{5+\sqrt{7}}})$ воспользуемся формулой, доказанной в пункте б): $\cos(2\arcsin a) = 1 - 2a^2$.

В данном случае, $a = \frac{2}{\sqrt{5+\sqrt{7}}}$.

Сначала убедимся, что $|a| \le 1$. Для этого достаточно проверить, что $a^2 \le 1$.

$a^2 = (\frac{2}{\sqrt{5+\sqrt{7}}})^2 = \frac{4}{5+\sqrt{7}}$.

Поскольку $\sqrt{7} > 0$, то $5+\sqrt{7} > 5 > 4$. Значит, знаменатель больше числителя, и $a^2 < 1$. Следовательно, $|a| < 1$, и мы можем применить формулу.

Применяем формулу:

$\cos(2\arcsin\frac{2}{\sqrt{5+\sqrt{7}}}) = 1 - 2 \cdot (\frac{2}{\sqrt{5+\sqrt{7}}})^2 = 1 - 2 \cdot \frac{4}{5+\sqrt{7}} = 1 - \frac{8}{5+\sqrt{7}}$.

Приведем выражение к общему знаменателю:

$1 - \frac{8}{5+\sqrt{7}} = \frac{5+\sqrt{7}-8}{5+\sqrt{7}} = \frac{\sqrt{7}-3}{5+\sqrt{7}}$.

Чтобы упростить результат, избавимся от иррациональности в знаменателе, умножив числитель и знаменатель на сопряженное выражение $5-\sqrt{7}$:

$\frac{\sqrt{7}-3}{5+\sqrt{7}} \cdot \frac{5-\sqrt{7}}{5-\sqrt{7}} = \frac{(\sqrt{7}-3)(5-\sqrt{7})}{(5+\sqrt{7})(5-\sqrt{7})} = \frac{5\sqrt{7} - (\sqrt{7})^2 - 15 + 3\sqrt{7}}{5^2 - (\sqrt{7})^2}$.

$\frac{5\sqrt{7} - 7 - 15 + 3\sqrt{7}}{25 - 7} = \frac{8\sqrt{7} - 22}{18}$.

Сократим дробь на 2:

$\frac{2(4\sqrt{7} - 11)}{18} = \frac{4\sqrt{7} - 11}{9}$.

Ответ: $\frac{4\sqrt{7} - 11}{9}$.

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