Prove that sin3x+sin2x-sin x=4sin x cos(x)/(2)cos(3x)/(2)

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Prove that sin3x+sin2x-sin x=4sin x cos(x)/(2)cos(3x)/(2)
Prove that sin3x+sin2x-sinx=4sinx cos(x/2) cos(3x/2)
Proof of sin 3x+sin 2x-sin x=4 sin x cos x/2 cos 3x/2

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