--description--

In this video, you will learn how to use the unit circle to find the sine and cosine of angles.

--questions--

--text--

What is a unit circle?

--answers--

A circle with a radius of 0 units.

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A circle with a radius of 1 unit.

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A circle with a radius of 2 units.

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A circle with a radius of 0.5 units.

--video-solution--

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