Question
Prove the identity.$$\sin (3 x)=3 \sin (x) \cos ^{2}(x)-\sin ^{3}(x)$$
Step 1
Step 1: Start with the left-hand side of the equation and express $\sin(3x)$ as $\sin(2x + x)$: $$ \sin(3x) = \sin(2x + x) $$ Show more…
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