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Prove that nC1 sinx.cos(n - 1)x + nC2 s...

Prove that `nC_1 sinx.cos(n - 1)x + nC_2 sin 2x. cos(n - 2)x + nC_3 sin 3x. cos(n - 3)x +...+ nC_n sin nx = 2^(n-1)sinnx`

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