# Evaluating Trigonometric Functions at Important Angles

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In this lesson we will look at how to use the unit circle and reference angles to find some values for different trigonometric functions.

Evaluating Trigonometric Functions at Important Angles, Ex 1
How to use the unit circle and reference angles to find some values for different trig functions
Evaluating Trigonometric Functions at Important Angles, Ex 2

Evaluating Trigonometric Functions Using the Reference Angle, Example 1
This video reviews the unit circle in quadrant 1 and discusses how to use the reference angle to evaluate some trig functions.
Evaluating Trigonometric Functions Using the Reference Angle, Example 2
This video discusses how to use the reference angle to evaluate some more trig functions.

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