precalculus
posted by Yoshi .
express the roots of unity in standard form a+bi.
1.) cube roots of unity
2.) fourth roots of unity
3.) sixth roots of unity
4.) square roots of unity

The following link will explain in detail the roots of unity.
If you have answers to be checked, feel free to post them. 
I don't see the link. I don't think this website allows you to put up links

Sorry, it was my omission.
http://en.wikipedia.org/wiki/Root_of_unity