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Prove that (sin 7x +sin 5x)+(sin 9x+ sin 3x)(cos 7x+ cos 5x)+(cos 9x + cos 3x)=tan 6x |
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Answer» Prove that (sin 7x +sin 5x)+(sin 9x+ sin 3x)(cos 7x+ cos 5x)+(cos 9x + cos 3x)=tan 6x |
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