Предмет: Алгебра, автор: kirill2449628

Очень срочно! Помогите Пожалуйста! только пятое и седьмое.

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Автор ответа: gulziramusabekova

0

Ответ:

5)sin(2a)/cos(a)-1

7) 1

kirill2449628: Как ты это решил?

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