Предмет: Алгебра, автор: usenova2203

cos
cos ^4 x - sin ^4x = 1
​

Ответы

Автор ответа: KatyafFri
0

Ответ:

(sin^2 x+cos^2 x)^2-2sin^2x*cos^2x=sinx*cosx 1-sin^2 2x=1/2 *sin 2x дальше все ясно

Объяснение:

Все легко

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