Photos Y SIN X COS 3X

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Y sin x cos 3x. Sin2x. Cos2x. Sin x + sin 2 x 2 = cos 2 x 2. Sin2x+sin2x=3.
Sin2x. Cos2x. Sin x + sin 2 x 2 = cos 2 x 2. Sin2x+sin2x=3.

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