Wikipedia

Wikipedia is a great resource, it actually has alot of math on it.
Here's three links that could help you:
Law of sines - http://en.wikipedia.org/wiki/Law_of_sines
Law of cosines -http://en.wikipedia.org/wiki/Law_of_cosines
List of trigonometric identities- http://en.wikipedia.org/wiki/List_of_trigonometric_identities
*The list of trig identities includes things that we have not learned. So if you see something and you have no idead what it means, doesn't even look familiar, don't get alarmed... Because we haven't covered it.

These are only three links, there are several more from everything that we have learned that I encourage you to go and check out.