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Trig Review
Here is the Trig portion of my Algebra/Trig Review. It contains the following sections.
Trig Function Evaluation 
How to use the unit circle to find the value
of trig functions at some basic angles.
Graphs of Trig Functions The graphs of the trig functions and some nice
properties that can be seen from the graphs.
Trig Formulas
Some important trig formulas that you will
find useful in a Calculus course.
Solving Trig Equations Techniques for solving equations involving
trig functions.
Inverse Trig Functions The basics of inverse trig functions.