1) cos(pi/2+ x) = 1/2
2) sin(2) x - 2sinx = 0
3) 2cos(2) x = 3 sin x

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1) cos(pi/2+ x) = 1/2 2) sin(2) x - 2sinx = 0 3) 2cos(2) x = 3 sin x

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1) cos(pi/2+ x) = 1/2
2) sin(2) x - 2sinx = 0
3) 2cos(2) x = 3 sin x