maximum 2sin^3x + 3/4 sin 2x + 9/2 cos 2x - 9cos x - 3/2 x + 6 for 0<x<pi/2maximum 2sin^3x + 3/4 sin 2x + 9/2 cos 2x - 9cos x - 3/2 x + 6 for 0<x<pi/2

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