Предмет: Алгебра, автор: aidana570

ctga(1-cos2a) помогите пожалуйста

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Автор ответа: natali15medved

0

Ctga(1-Cos²a+Sin²a)=Ctga(Sin²a+Sin²a)=(Cosa*2*Sin²a)/sina=2Sina*Cosa=Sin2a

Автор ответа: natali15medved

0

спасибо за оценку

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