Prove that \frac{\sin A \cdot \sin 2 A+\sin 3 A \cdot \sin 6 A}{\sin A – InterviewSolution

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1.	Prove that \frac{\sin A \cdot \sin 2 A+\sin 3 A \cdot \sin 6 A}{\sin A \cdot \cos 2 A+\sin 3 A \cdot \cos 6 A}=\tan 5 A
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