Предмет: Математика, автор: Ворон111111

срочно помогите!!!!!!!!!!!!

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Автор ответа: vlad210170

0

Ответ:

Пошаговое объяснение:

$\frac{Sin a * Cos a}{Sin a*(-Sin a) } = - \frac{Cos a}{Sin a} = - ctg a$

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