Thread: complex numbers

given that z = 8i express z in polar form and obtain the three cube roots of 8i in polar form.

Originally Posted by lovelyl

given that z = 8i express z in polar form and obtain the three cube roots of 8i in polar form.

You should be able to see that where n is an integer (did you plot z on an Argand diagram?). Now use deMoivre's Theorem.