Originally Posted by

**beanus** Hello first time poster here! Just found out about this forum. I have a fairly simple question for most of you all I think, so here goes.

This question has several parts, I'm currently stuck on the first.

Find the fifth roots of the complex number.

98.6(cos(5.06)+sin(5.06)i)

Where theta=5.06 is in radians. There are five roots in the interval [0,2TT) and they all have the same r>0

1. Find r>0

2. Find the first angle

3. Find the second angle

4. Find the third angle

5. Find the forth angle

6. Find the fifth angle

So I'm stuck on number one and I thought I knew how to do these. What I got is:

98.6(cos(5.06)+sin(5.06)i) = 33.58835505 - 92.70265587i

r = sqrt((33.588)^2+(-92.703)^2)

According to the online homework site I'm using, this answer is wrong. Can someone please help me?

Thanks!