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# Reference Angles and Angles in the Unit Circle

## Formed between the terminal side of an angle and the closest part of the x-axis.

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Basic Students matched to this level have a partial mastery of prerequisite knowledge and skills fundamental for proficient work.
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• Video

## Reference Angles - Overview

by CK-12 //basic
Overview
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• Video

## Reference Angles - Example 1

by CK-12 //basic
Find the reference angle given an angle measure
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## Reference Angles - Example 2

by CK-12 //basic
Use reference angles to evaluate trigonometric functions
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