Use De Moivre’s theorem to express sin θ interms of power of cos θ and sin θ , cos 4 θ+isin θ = 〖cos

Use De Moivre’s theorem to express sin θ interms of power of cos θ and sin θ , cos 4θ+isin 4θ = 〖(cos θ+isin θ)〗^2