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(cos x + isin x)(cos 2x + isin 2x)(cos 3x + isin 3x) = cos(x+2x+3x)+ isin(x+2x+3x).How??

(cos x + isin x)(cos 2x + isin 2x)(cos 3x + isin 3x) = cos(x+2x+3x)+ isin(x+2x+3x).How??

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1 Answers

Deepak Kumar Shringi
askIITians Faculty 4404 Points
5 years ago
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