Find reference angles.
Construct right triangles on a coordinate plane.
Recall the relationships of the sides of 30-60-90 and 45-45-90 right triangles.
Solve for any trig functions to an exact value without a calculator.
Convert between degree and radian measures.
Here's the review homework.
![](http://2.bp.blogspot.com/-jo6Gxuw5mPQ/U3ueZ3P_j3I/AAAAAAAABh8/M4Qn4oURPf0/s1600/20140520113833759_0002.jpg)
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