solution to cos 2 x sin x 1 0, sin 2 x + cos 2 x 1, sin 2 x + cos 2 x, cos 2 x / 1 sin x, sin x cos x solution, sin x + cos x 1/2, sin2 x + cos2 x 0, cos2 x + sin2 x 1, cos 2 x+sinx+1 0, solve sin x cos 2x, sin x 1/2 1-cos2x
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