Предмет: Алгебра, автор: juliagarafut

помогите пожалуйстааа

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Автор ответа: bestiacat

0

$-16cos2 alpha =-16(1-2sin^{2} alpha )=-16(1-2(-0.4)^2)=-16(1+2*0.16)$ $=-16(1+0.32)=-16*1.32=-21.12$

Автор ответа: juliagarafut

0

спасибо!

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