# Need help with polarcoordinates please!

1. Sep 27, 2011

### DabbisH

Hello, first of all lovely forums you have here. I would love to get some help with this task please.

In this exercise is z = -2 + 2i√3.

a) Find the polar coordinates of z.
b) Find z^22 and enter the number of the form a + ib

Thank you,

Greetings

2. Sep 27, 2011

### SammyS

Staff Emeritus
Welcome to PH Forums.

Please show what you have tried and where you are stuck so that we can help you.

3. Sep 27, 2011

### issacnewton

polar form of a complex number is

$$z=re^{i \theta}$$

so you have to convert your number in this form. To do it, use Euler's formula

http://en.wikipedia.org/wiki/Euler's_formula