Предмет: Алгебра, автор: wowbook

Спростите выражение: cos a tg a

Ответы

Автор ответа: inkognitous

0

tga = sina/cosa
cosa*tga= cosa* sina/cosa = sina
Ответ : sin a

wowbook: Я делал уже так,только с другим выражением. Сказали - не правильно.

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