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Powers of sines and cosines

Powers of sines and cosines

IB Year 6 | Grade 12

Prove that \(\sin^7 \theta = \frac{1}{64}(35\sin \theta - 21\sin 3\theta + 7\sin 5\theta - \sin 7\theta)\).

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Answer:\(\sin^7\theta=\frac{35\sin\theta-21\sin3\theta+7\sin5\theta-\sin7\theta}{64}\), proved.

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