Reference Angles

Learn how to find Reference Angles in this free video math tutorial by Mario's Math Tutoring. We discuss what a reference angle is and how they can be used.

0:01 How to find the reference angle
1:35 Example 1 Reference angle for 300 degrees
2:46 Example 2 Reference angle for 2pi/3
3:35 Formulas for finding reference angles depending on which quadrant the angle terminates.
4:49 Example 3 Reference angle for -210 degrees

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