Roots of Unity (8.6.4)

Question 1

• Also use DeMoivre’s theorem to find the nth roots of a complex number in polar form. The nth roots of the complex number z = r (cosθ + i sinθ) are given by the formula.

Answer 1

• Also use DeMoivre’s theorem to find the nth roots of a complex number in polar form. The nth roots of the complex number z = r (cosθ + i sinθ) are given by the formula.

Question 2

• The roots of unity are the complex roots of 1.

Answer 2

• The roots of unity are the complex roots of 1.