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Cos 3п 2x. 2-2 Cos(x-п/3)=2. Cos(2x+п/3)=-1. 2cos(3/2п +x)=. Cos(п/2-x)-3cos2x-2. Cos6x. 2cos3x-cos6x. Решите уравнение `sin^6x+cos^6x=sin^2x`.. Решите уравнение sin2x  3 cos2x  2cos6x.. TGX cos 3п/2-2x 0 на промежутке. Cos(2п-2x). 2cos2x. 2cos^2(x/2). Cos2x 1 cos2x 3sin2x