De Moivre’s Theorem
For any rational number n, cos nθ + i sin nθ is the value or one of the values of (cos θ + i sin θ)n.
(cos θ + i sin θ)n = cos nθ + i sin nθ
De Moivre’s theorem holds good for irrational values also.
Properties
For any rational number n, cos nθ + i sin nθ is the value or one of the values of (cos θ + i sin θ)n.
(cos θ + i sin θ)n = cos nθ + i sin nθ
De Moivre’s theorem holds good for irrational values also.