Предмет: Алгебра, автор: ketherineya

Решите уравнение Cos^2x+cosx=-sin^2x

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Автор ответа: Артем2017

Cos^2x+cosx=-sin^2x
Cos^2x+sin^2x=cosx
соs х = 1
х= 0+2пиК
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