Unit Circle

conclusion: The Complete Unit Circle

Picture

The Unit Circle is a very helpful tool in trigonometry and once you get used to it, it's easy to use. If you are having some problems with this, here is some extra help.

Here are some links for further help on the Unit Circle:

http://www.cramster.com/tag-r27-6990-cpi0-0.aspx
http://www.tutor.com/resources/resourceframe.aspx?id=762
http://www.mathwarehouse.com/

Here's a video that summarizes the lesson: 
https://www.youtube.com/watch?v=1GEgl0_ieY0