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# Cosine Function on a Right Triangle

## Learn About the Cosine Function on a Right Triangle

The cosine function can be used on a right triangle. The cosine of an angle gives the ratio of the length of the adjacent side to the length of the hypotenuse.## About This Widget

This widget allows you to find the angle, adjacent and hypotenuse of a right triangle. Draw a right triangle by:- Clicking on the canvas, or
- Entering
__two__of the angle, adjacent and hypotenuse.

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