My math class is possibly the worst arranged class I've ever been in. I think I've said that before on this site. Part of me wants to fail to keep my teacher's reputation realistic, but the other part decided to come here. :>

I'm stuck on these two things.

Find the principle root of in polar form.

aaaand

Find in rectangular form.

I have no information to even know where to begin here, since there is no textbook, and this wasn't gone over before in the class. I don't know what to do with the first one, since I think I need values for a and b and the whole thing only seems to be one? And I tried to find R for the second one and ended up with the square root of zero, which seems wrong, so I pretty much stopped there...