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Express each of the following as the sum or difference of sines and cosines : (i) 2sin 3θ cos θ (ii) 2cos 3θ sin 2θ (iii) 2sin 4θ sin 3θ (iv) 2cos 7θ cos 3θ |
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Answer» Express each of the following as the sum or difference of sines and cosines : |
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