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X 0 p. Cos(3п/2-x). 3п/2<x<2п. 2-2 Cos(x-п/3)=2. Cos(x-п/2)-x^2.
Cos(3п/2-x). 3п/2<x<2п. 2-2 Cos(x-п/3)=2. Cos(x-п/2)-x^2.

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