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Cos 4 x. 4sin 4 2x+3cos4x-1 0 решите. Решить sin2x=cos^4 x/2 - sin^4 x/2. Sin4x cos4x sin 2 2x-1/2. 2cos2x+sin4x=1.
4sin 4 2x+3cos4x-1 0 решите. Решить sin2x=cos^4 x/2 - sin^4 x/2. Sin4x cos4x sin 2 2x-1/2. 2cos2x+sin4x=1.

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