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Question: using the binomial theorem n 2 0 a b e...

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Using the binomial theorem (n 2 0, a, b E C): TL (a + b)n = n、(n and for t E R, use DeMoivres theorem to verify the identity: cos nt isin nt Σ C) İn_j cos t sinn-j t. Use this result to show that cos 5t = cos5 t-10 cos3 t sin2 t + 5 cost sin4 t. sin 5t = sn t-10 cos2 t sin3 t + 5 cos4 t sin t.

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