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Sin2 π 2 x. Cos x/3 -1/2. Cos(π2−x). Cos π/2. Cos π(x+2)/3 = 1/2 решение.
Cos x/3 -1/2. Cos(π2−x). Cos π/2. Cos π(x+2)/3 = 1/2 решение.

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