# Homework Help: Complex number help

1. Dec 25, 2009

### Wardlaw

Complex number help!!!

1. The problem statement, all variables and given/known data

Find the modulus and principle argument of 1/(-sqrt(3)+i)

2. Relevant equations

3. The attempt at a solution

I attempted this solution by using the complex conjugate, and as i^2=-1, i eventually ended up with 4 in the denominator. Any suggestions?
1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

2. Dec 25, 2009

### yungman

Re: Complex number help!!!

$$(-\sqrt{3}+j)(-\sqrt{3}-j)=3-1=2$$

So you should get $$\frac{-\sqrt{3}-j}{2}$$

3. Dec 25, 2009

### AEM

Re: Complex number help!!!

Before you make use of the previous post, multiply numerator and denominator by the complex conjugate of the denominator. Then make use of Yungman's post. From there it's a standard manipulation.