Предмет: Алгебра, автор: ismailovS

решите уравнение :-sin x= cos x

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Автор ответа: Аноним

0

-Sin x= Cos x | : Cosx≠ 0
-tgx = 1
tgx = -1
x = -π/4 + πk , k ∈ Z

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