(See) Prove the following identity (sin 3alpha -3 sin α)/(cos 3alpha +3 cos α)=- tan
Question: Prove the following identity
\[\frac{\sin 3\alpha -3\sin \alpha }{\cos 3\alpha +3\cos \alpha }=-{{\tan }^{3}}\alpha \]
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![[Solution Library] Prove that (sin (α +β)+](/images/solutions/MC-solution-library-36285.jpg "[Solution Library] Prove that (sin (α +β)+ cos (α")
