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b.vijayalakshmi

  • 3 years ago

Using de Moivre’s theorem, express cos 6θ and sin 6θ in powers of cos θ and sin θ. Do i have to use binomial expansion??

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  1. vinrar
    • 3 years ago
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    yes

  2. b.vijayalakshmi
    • 3 years ago
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    i want full explanation

  3. Snapbacklive
    • 3 years ago
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    \[=\cos^{6}+6i \cos^{5}\sin-15\cos^{4}\sin^{2}-20i \cos^{3}\sin^{3}+15\cos^{2}\sin^{4}+6i \cos \sin^{5}-\sin^{6}\].

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