Math, asked by treesasruthy91, 9 months ago

Prove that sin A+ sin 3A+ sin 5A+ sin 7A = 4 cos A cos 2A sin 4A.

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Answered by ruses

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Answer:

sin A+ sin 3A +sin 5 A+ sin 7A), ( cos A + cos 3A +cos 5A+ cos 7A)=tan 4A.

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