Номер 11, страница 110, 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 3. Обратные тригонометрические функции. 3.4. Арксинус. Задачи - номер 11, страница 110.

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                            "created_at" => "2026-04-10 13:58:26"
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                            "created_at" => "2026-04-10 13:58:26"
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    "parent_branches" => Illuminate\Database\Eloquent\Collection {#1106
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            }
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            "field_branch_cover" => array:1 [
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            "field_branch_covers" => array:1 [
              0 => array:4 [
                "path" => "/media/algebra_10/baspasy-u19/covers/cover1.webp?ts=1752152865"
                "alt" => ""
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              ]
            ]
            "book" => Illuminate\Database\Eloquent\Collection {#1120
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                0 => App\Models\Book {#1049}
              ]
              #escapeWhenCastingToString: false
            }
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1121
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            }
          ]
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          #primaryKey: "id"
          #keyType: "int"
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                    "created_at" => "2026-04-10 13:58:26"
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                0 => App\Models\Book {#1049}
              ]
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            }
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1124
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                0 => App\Models\Branch {#1045}
              ]
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        2 => App\Models\Branch {#1127
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          #table: "branches"
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          #keyType: "int"
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              #items: array:1 [
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                    "created_at" => "2026-04-10 13:58:26"
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                0 => App\Models\Book {#1049}
              ]
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            }
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1139
              #items: array:1 [
                0 => App\Models\Branch {#1138
                  #connection: "mysql"
                  #table: "branches"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: true
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                    "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1140 …2}
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                    0 => "*"
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          ]
        }
        3 => App\Models\Branch {#1132
          #connection: "mysql"
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            "created_at" => "2026-04-10 13:58:26"
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                0 => App\Models\Book {#1049}
              ]
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            }
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1148
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                0 => App\Models\Branch {#1147
                  #connection: "mysql"
                  #table: "branches"
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                }
              ]
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            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1129}
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        }
        4 => App\Models\Branch {#1136
          #connection: "mysql"
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          #keyType: "int"
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          #with: []
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            "field_page_start" => "106"
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              ]
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            }
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1157
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                0 => App\Models\Branch {#1156
                  #connection: "mysql"
                  #table: "branches"
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                  +incrementing: true
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      ]
      #escapeWhenCastingToString: false
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    "content" => Illuminate\Database\Eloquent\Collection {#1038
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        0 => App\Models\Element {#1098
          #connection: "mysql"
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                0 => App\Models\Edition {#1097
                  #connection: "mysql"
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                  #primaryKey: "id"
                  #keyType: "int"
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                    "created_at" => "2026-04-10 13:58:26"
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                    "field_page_content_text_checked" => "0"
                    "field_solution_author" => "Автор"
                    "field_moderator" => "pasha"
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                  ]
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                  ]
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                    0 => "*"
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              ]
              #escapeWhenCastingToString: false
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            "task" => array:2 [
              "refs" => "1119761"
              "type" => "task"
            ]
            "text" => "<p><strong>11. (3)</strong> Упростите следующие выражения:</p><p><strong>а)</strong> $\mathrm{arctg}(\mathrm{tg}1)$, $\mathrm{arctg}(\mathrm{tg}\frac{5}{7}\pi)$, $\mathrm{arctg}(\mathrm{tg}2)$;</p><p><strong>б)</strong> $\mathrm{arctg}(\mathrm{tg}\frac{15}{8}\pi)$, $\mathrm{arctg}(\mathrm{tg}6)$.</p>"
            "img" => array:1 [
              0 => array:5 [
                "name" => "11-1.jpg"
                "alt" => null
                "width" => "1605"
                "height" => 271
                "path" => "/media/algebra_10/baspasy-u19/0-2-3-4zad/11-1.webp?ts=1753534584"
              ]
            ]
          ]
          #original: array:7 [
            "id" => 1300444
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "edition" => Illuminate\Database\Eloquent\Collection {#1088}
            "task" => array:2 [
              "refs" => "1119761"
              "type" => "task"
            ]
            "text" => "<p><strong>11. (3)</strong> Упростите следующие выражения:</p><p><strong>а)</strong> $\mathrm{arctg}(\mathrm{tg}1)$, $\mathrm{arctg}(\mathrm{tg}\frac{5}{7}\pi)$, $\mathrm{arctg}(\mathrm{tg}2)$;</p><p><strong>б)</strong> $\mathrm{arctg}(\mathrm{tg}\frac{15}{8}\pi)$, $\mathrm{arctg}(\mathrm{tg}6)$.</p>"
            "img" => array:1 [
              0 => array:5 [
                "name" => "11-1.jpg"
                "alt" => null
                "width" => "1605"
                "height" => 271
                "path" => "/media/algebra_10/baspasy-u19/0-2-3-4zad/11-1.webp?ts=1753534584"
              ]
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          ]
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            0 => "*"
          ]
        }
        1 => App\Models\Element {#1090
          #connection: "mysql"
          #table: "elements"
          #primaryKey: "id"
          #keyType: "int"
          +incrementing: true
          #with: []
          #withCount: []
          +preventsLazyLoading: false
          #perPage: 15
          +exists: true
          +wasRecentlyCreated: false
          #escapeWhenCastingToString: false
          #attributes: array:6 [
            "id" => 1551480
            "created_at" => "2026-04-10 13:58:26"
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            "edition" => Illuminate\Database\Eloquent\Collection {#1082
              #items: array:1 [
                0 => App\Models\Edition {#1091
                  #connection: "mysql"
                  #table: "editions"
                  #primaryKey: "id"
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            "text" => "<p><strong>а)</strong></p><p>Для упрощения выражений вида $arctg(tg(x))$ используется основное тождество для арктангенса. Значением выражения $arctg(tg(\alpha))$ является такое число $\beta$, что $tg(\beta) = tg(\alpha)$ и $-\frac{\pi}{2} < \beta < \frac{\pi}{2}$. Поскольку тангенс имеет период $\pi$, то $tg(\alpha) = tg(\alpha - k\pi)$ для любого целого $k$. Таким образом, задача сводится к нахождению такого целого числа $k$, чтобы величина $\beta = \alpha - k\pi$ попала в интервал $(-\frac{\pi}{2}, \frac{\pi}{2})$.</p><p><em>Упростим $arctg(tg1)$:</em><br>Аргумент тангенса равен 1. Используем приближенное значение $\pi \approx 3.14159$, тогда область значений арктангенса $(-\frac{\pi}{2}, \frac{\pi}{2})$ примерно равна $(-1.57, 1.57)$.<br>Поскольку $1$ принадлежит этому интервалу, то $k=0$.<br>Следовательно, $arctg(tg1) = 1$.</p><p><em>Упростим $arctg(tg(\frac{5}{7}\pi))$:</em><br>Аргумент тангенса $\alpha = \frac{5}{7}\pi$. Так как $\frac{5}{7} > \frac{1}{2}$, то $\frac{5}{7}\pi > \frac{\pi}{2}$, и это значение не входит в область значений арктангенса.<br>Найдем подходящее $k$. Попробуем $k=1$:<br>$\beta = \frac{5}{7}\pi - 1 \cdot \pi = \frac{5\pi - 7\pi}{7} = -\frac{2}{7}\pi$.<br>Проверим, входит ли $-\frac{2}{7}\pi$ в интервал $(-\frac{\pi}{2}, \frac{\pi}{2})$. Неравенство $-\frac{1}{2} < -\frac{2}{7} < \frac{1}{2}$ верно. <br>Следовательно, $arctg(tg(\frac{5}{7}\pi)) = -\frac{2}{7}\pi$.</p><p><em>Упростим $arctg(tg2)$:</em><br>Аргумент тангенса $\alpha = 2$. Так как $2 > \frac{\pi}{2} \approx 1.57$, это значение не входит в область значений арктангенса.<br>Найдем подходящее $k$. Попробуем $k=1$:<br>$\beta = 2 - 1 \cdot \pi = 2 - \pi$.<br>Приблизительное значение $2 - \pi \approx 2 - 3.14159 = -1.14159$. Это значение входит в интервал $(-1.57, 1.57)$.<br>Следовательно, $arctg(tg2) = 2 - \pi$.</p><p><strong>Ответ:</strong> $1$; $-\frac{2}{7}\pi$; $2 - \pi$.</p><p><strong>б)</strong></p><p>Используем тот же подход, что и в пункте а).</p><p><em>Упростим $arctg(tg(\frac{15}{8}\pi))$:</em><br>Аргумент тангенса $\alpha = \frac{15}{8}\pi$. Это значение не принадлежит интервалу $(-\frac{\pi}{2}, \frac{\pi}{2})$.<br>Найдем целое $k$, решив неравенство: $-\frac{\pi}{2} < \frac{15}{8}\pi - k\pi < \frac{\pi}{2}$.<br>Разделим все части на $\pi$: $-\frac{1}{2} < \frac{15}{8} - k < \frac{1}{2}$.<br>$-\frac{1}{2} < 1.875 - k < \frac{1}{2}$.<br>$-0.5 - 1.875 < -k < 0.5 - 1.875$.<br>$-2.375 < -k < -1.375$.<br>Умножим на -1, изменив знаки неравенства: $1.375 < k < 2.375$.<br>Единственное целое $k$ в этом интервале — это $k=2$.<br>Тогда $\beta = \frac{15}{8}\pi - 2\pi = \frac{15\pi - 16\pi}{8} = -\frac{\pi}{8}$.<br>Следовательно, $arctg(tg(\frac{15}{8}\pi)) = -\frac{\pi}{8}$.</p><p><em>Упростим $arctg(tg6)$:</em><br>Аргумент тангенса $\alpha = 6$. Это значение не принадлежит интервалу $(-\frac{\pi}{2}, \frac{\pi}{2})$.<br>Найдем целое $k$, решив неравенство: $-\frac{\pi}{2} < 6 - k\pi < \frac{\pi}{2}$.<br>$-\frac{\pi}{2} - 6 < -k\pi < \frac{\pi}{2} - 6$.<br>Разделим все части на $-\pi$ и изменим знаки неравенства: $\frac{-\frac{\pi}{2}-6}{-\pi} > k > \frac{\frac{\pi}{2}-6}{-\pi}$.<br>$\frac{6}{\pi} + \frac{1}{2} > k > \frac{6}{\pi} - \frac{1}{2}$.<br>Используя $\pi \approx 3.14$: $\frac{6}{3.14} + 0.5 > k > \frac{6}{3.14} - 0.5$.<br>$1.91 + 0.5 > k > 1.91 - 0.5$.<br>$2.41 > k > 1.41$.<br>Единственное целое $k$ в этом интервале — это $k=2$.<br>Тогда $\beta = 6 - 2\pi$.<br>Следовательно, $arctg(tg6) = 6 - 2\pi$.</p><p><strong>Ответ:</strong> $-\frac{\pi}{8}$; $6 - 2\pi$.</p>"
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            "text" => "<p><strong>а)</strong></p><p>Для упрощения выражений вида $arctg(tg(x))$ используется основное тождество для арктангенса. Значением выражения $arctg(tg(\alpha))$ является такое число $\beta$, что $tg(\beta) = tg(\alpha)$ и $-\frac{\pi}{2} < \beta < \frac{\pi}{2}$. Поскольку тангенс имеет период $\pi$, то $tg(\alpha) = tg(\alpha - k\pi)$ для любого целого $k$. Таким образом, задача сводится к нахождению такого целого числа $k$, чтобы величина $\beta = \alpha - k\pi$ попала в интервал $(-\frac{\pi}{2}, \frac{\pi}{2})$.</p><p><em>Упростим $arctg(tg1)$:</em><br>Аргумент тангенса равен 1. Используем приближенное значение $\pi \approx 3.14159$, тогда область значений арктангенса $(-\frac{\pi}{2}, \frac{\pi}{2})$ примерно равна $(-1.57, 1.57)$.<br>Поскольку $1$ принадлежит этому интервалу, то $k=0$.<br>Следовательно, $arctg(tg1) = 1$.</p><p><em>Упростим $arctg(tg(\frac{5}{7}\pi))$:</em><br>Аргумент тангенса $\alpha = \frac{5}{7}\pi$. Так как $\frac{5}{7} > \frac{1}{2}$, то $\frac{5}{7}\pi > \frac{\pi}{2}$, и это значение не входит в область значений арктангенса.<br>Найдем подходящее $k$. Попробуем $k=1$:<br>$\beta = \frac{5}{7}\pi - 1 \cdot \pi = \frac{5\pi - 7\pi}{7} = -\frac{2}{7}\pi$.<br>Проверим, входит ли $-\frac{2}{7}\pi$ в интервал $(-\frac{\pi}{2}, \frac{\pi}{2})$. Неравенство $-\frac{1}{2} < -\frac{2}{7} < \frac{1}{2}$ верно. <br>Следовательно, $arctg(tg(\frac{5}{7}\pi)) = -\frac{2}{7}\pi$.</p><p><em>Упростим $arctg(tg2)$:</em><br>Аргумент тангенса $\alpha = 2$. Так как $2 > \frac{\pi}{2} \approx 1.57$, это значение не входит в область значений арктангенса.<br>Найдем подходящее $k$. Попробуем $k=1$:<br>$\beta = 2 - 1 \cdot \pi = 2 - \pi$.<br>Приблизительное значение $2 - \pi \approx 2 - 3.14159 = -1.14159$. Это значение входит в интервал $(-1.57, 1.57)$.<br>Следовательно, $arctg(tg2) = 2 - \pi$.</p><p><strong>Ответ:</strong> $1$; $-\frac{2}{7}\pi$; $2 - \pi$.</p><p><strong>б)</strong></p><p>Используем тот же подход, что и в пункте а).</p><p><em>Упростим $arctg(tg(\frac{15}{8}\pi))$:</em><br>Аргумент тангенса $\alpha = \frac{15}{8}\pi$. Это значение не принадлежит интервалу $(-\frac{\pi}{2}, \frac{\pi}{2})$.<br>Найдем целое $k$, решив неравенство: $-\frac{\pi}{2} < \frac{15}{8}\pi - k\pi < \frac{\pi}{2}$.<br>Разделим все части на $\pi$: $-\frac{1}{2} < \frac{15}{8} - k < \frac{1}{2}$.<br>$-\frac{1}{2} < 1.875 - k < \frac{1}{2}$.<br>$-0.5 - 1.875 < -k < 0.5 - 1.875$.<br>$-2.375 < -k < -1.375$.<br>Умножим на -1, изменив знаки неравенства: $1.375 < k < 2.375$.<br>Единственное целое $k$ в этом интервале — это $k=2$.<br>Тогда $\beta = \frac{15}{8}\pi - 2\pi = \frac{15\pi - 16\pi}{8} = -\frac{\pi}{8}$.<br>Следовательно, $arctg(tg(\frac{15}{8}\pi)) = -\frac{\pi}{8}$.</p><p><em>Упростим $arctg(tg6)$:</em><br>Аргумент тангенса $\alpha = 6$. Это значение не принадлежит интервалу $(-\frac{\pi}{2}, \frac{\pi}{2})$.<br>Найдем целое $k$, решив неравенство: $-\frac{\pi}{2} < 6 - k\pi < \frac{\pi}{2}$.<br>$-\frac{\pi}{2} - 6 < -k\pi < \frac{\pi}{2} - 6$.<br>Разделим все части на $-\pi$ и изменим знаки неравенства: $\frac{-\frac{\pi}{2}-6}{-\pi} > k > \frac{\frac{\pi}{2}-6}{-\pi}$.<br>$\frac{6}{\pi} + \frac{1}{2} > k > \frac{6}{\pi} - \frac{1}{2}$.<br>Используя $\pi \approx 3.14$: $\frac{6}{3.14} + 0.5 > k > \frac{6}{3.14} - 0.5$.<br>$1.91 + 0.5 > k > 1.91 - 0.5$.<br>$2.41 > k > 1.41$.<br>Единственное целое $k$ в этом интервале — это $k=2$.<br>Тогда $\beta = 6 - 2\pi$.<br>Следовательно, $arctg(tg6) = 6 - 2\pi$.</p><p><strong>Ответ:</strong> $-\frac{\pi}{8}$; $6 - 2\pi$.</p>"
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№11 (с. 110)
Условие. №11 (с. 110)
скриншот условия
Алгебра, 10 класс Учебник, авторы: Пак Олег Владимирович, Ардакулы Дархан, Ескендирова Елена Викторовна, издательство Алматыкітап баспасы, Алматы, 2019, Часть 1, страница 110, номер 11, Условие

11. (3) Упростите следующие выражения:

а) $\mathrm{arctg}(\mathrm{tg}1)$, $\mathrm{arctg}(\mathrm{tg}\frac{5}{7}\pi)$, $\mathrm{arctg}(\mathrm{tg}2)$;

б) $\mathrm{arctg}(\mathrm{tg}\frac{15}{8}\pi)$, $\mathrm{arctg}(\mathrm{tg}6)$.

Решение 2 (rus). №11 (с. 110)

а)

Для упрощения выражений вида $arctg(tg(x))$ используется основное тождество для арктангенса. Значением выражения $arctg(tg(\alpha))$ является такое число $\beta$, что $tg(\beta) = tg(\alpha)$ и $-\frac{\pi}{2} < \beta < \frac{\pi}{2}$. Поскольку тангенс имеет период $\pi$, то $tg(\alpha) = tg(\alpha - k\pi)$ для любого целого $k$. Таким образом, задача сводится к нахождению такого целого числа $k$, чтобы величина $\beta = \alpha - k\pi$ попала в интервал $(-\frac{\pi}{2}, \frac{\pi}{2})$.

Упростим $arctg(tg1)$:
Аргумент тангенса равен 1. Используем приближенное значение $\pi \approx 3.14159$, тогда область значений арктангенса $(-\frac{\pi}{2}, \frac{\pi}{2})$ примерно равна $(-1.57, 1.57)$.
Поскольку $1$ принадлежит этому интервалу, то $k=0$.
Следовательно, $arctg(tg1) = 1$.

Упростим $arctg(tg(\frac{5}{7}\pi))$:
Аргумент тангенса $\alpha = \frac{5}{7}\pi$. Так как $\frac{5}{7} > \frac{1}{2}$, то $\frac{5}{7}\pi > \frac{\pi}{2}$, и это значение не входит в область значений арктангенса.
Найдем подходящее $k$. Попробуем $k=1$:
$\beta = \frac{5}{7}\pi - 1 \cdot \pi = \frac{5\pi - 7\pi}{7} = -\frac{2}{7}\pi$.
Проверим, входит ли $-\frac{2}{7}\pi$ в интервал $(-\frac{\pi}{2}, \frac{\pi}{2})$. Неравенство $-\frac{1}{2} < -\frac{2}{7} < \frac{1}{2}$ верно.
Следовательно, $arctg(tg(\frac{5}{7}\pi)) = -\frac{2}{7}\pi$.

Упростим $arctg(tg2)$:
Аргумент тангенса $\alpha = 2$. Так как $2 > \frac{\pi}{2} \approx 1.57$, это значение не входит в область значений арктангенса.
Найдем подходящее $k$. Попробуем $k=1$:
$\beta = 2 - 1 \cdot \pi = 2 - \pi$.
Приблизительное значение $2 - \pi \approx 2 - 3.14159 = -1.14159$. Это значение входит в интервал $(-1.57, 1.57)$.
Следовательно, $arctg(tg2) = 2 - \pi$.

Ответ: $1$; $-\frac{2}{7}\pi$; $2 - \pi$.

б)

Используем тот же подход, что и в пункте а).

Упростим $arctg(tg(\frac{15}{8}\pi))$:
Аргумент тангенса $\alpha = \frac{15}{8}\pi$. Это значение не принадлежит интервалу $(-\frac{\pi}{2}, \frac{\pi}{2})$.
Найдем целое $k$, решив неравенство: $-\frac{\pi}{2} < \frac{15}{8}\pi - k\pi < \frac{\pi}{2}$.
Разделим все части на $\pi$: $-\frac{1}{2} < \frac{15}{8} - k < \frac{1}{2}$.
$-\frac{1}{2} < 1.875 - k < \frac{1}{2}$.
$-0.5 - 1.875 < -k < 0.5 - 1.875$.
$-2.375 < -k < -1.375$.
Умножим на -1, изменив знаки неравенства: $1.375 < k < 2.375$.
Единственное целое $k$ в этом интервале — это $k=2$.
Тогда $\beta = \frac{15}{8}\pi - 2\pi = \frac{15\pi - 16\pi}{8} = -\frac{\pi}{8}$.
Следовательно, $arctg(tg(\frac{15}{8}\pi)) = -\frac{\pi}{8}$.

Упростим $arctg(tg6)$:
Аргумент тангенса $\alpha = 6$. Это значение не принадлежит интервалу $(-\frac{\pi}{2}, \frac{\pi}{2})$.
Найдем целое $k$, решив неравенство: $-\frac{\pi}{2} < 6 - k\pi < \frac{\pi}{2}$.
$-\frac{\pi}{2} - 6 < -k\pi < \frac{\pi}{2} - 6$.
Разделим все части на $-\pi$ и изменим знаки неравенства: $\frac{-\frac{\pi}{2}-6}{-\pi} > k > \frac{\frac{\pi}{2}-6}{-\pi}$.
$\frac{6}{\pi} + \frac{1}{2} > k > \frac{6}{\pi} - \frac{1}{2}$.
Используя $\pi \approx 3.14$: $\frac{6}{3.14} + 0.5 > k > \frac{6}{3.14} - 0.5$.
$1.91 + 0.5 > k > 1.91 - 0.5$.
$2.41 > k > 1.41$.
Единственное целое $k$ в этом интервале — это $k=2$.
Тогда $\beta = 6 - 2\pi$.
Следовательно, $arctg(tg6) = 6 - 2\pi$.

Ответ: $-\frac{\pi}{8}$; $6 - 2\pi$.

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