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Sin c. Преобразовать cos 2x. Sin(x-1)=cos(x+2). 6cos2325-6cos2755. 2cos x/2 1+cos x.
Преобразовать cos 2x. Sin(x-1)=cos(x+2). 6cos2325-6cos2755. 2cos x/2 1+cos x.

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