Предмет: Алгебра, автор: lnet174

Решите пожалуйста 43 пример, буду благодарен за помощь

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Автор ответа: inblu

$( frac{1}{sin^2a}-1)tg^2a=frac{1-sin^2a}{sin^2a}* frac{sin^2a}{cos^2a}= frac{1-sin^2a}{cos^2a}= frac{cos^2a}{cos^2a}=1$

Автор ответа: lnet174

Благодарю Вас за помощь!!

Автор ответа: inblu

))

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Cheese Rolling
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