Sin 3 x-sin 2 x-sin x-4 sin x cos x-2cos 3 x-2

Sin 3x + sin 2x sin x = sin 2x + sin 3x sin x = sin 2x + sin 3x sin x [sin A sin B = 2 cos(A+B/2) sin (A B/2)] = 2 sin x cosx + sin 3x sin x [sin ...

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Projection Formula

sin 3 x+sin 2...

Question

$S i n 3 x + s i n 2 x - s i n x = 4 s i n x \frac{c o s x}{2} \frac{c o s 3 x}{2}$

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Solution

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