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Description added (#28039)

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Basic description of a Unit Circle added as well as a link to a wiki article
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David Mc Cormack
2019-03-21 16:06:31 +00:00
committed by The Coding Aviator
parent ea596b6e93
commit 901d77d1ca
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guide/english/mathematics/unit-circle/index.md
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@ -3,13 +3,10 @@ title: Unit Circle
--- ---
## Unit Circle ## Unit Circle
This is a stub. <a href='https://github.com/freecodecamp/guides/tree/master/src/pages/mathematics/unit-circle/index.md' target='_blank' rel='nofollow'>Help our community expand it</a>. A unit circle is a circle with an r (radius) of value 1. It is frequently used, centered at coordinates 0,0, in the cartesian coordinate system as a part of trigonometry.
<a href='https://github.com/freecodecamp/guides/blob/master/README.md' target='_blank' rel='nofollow'>This quick style guide will help ensure your pull request gets accepted</a>. The interior of a unit circle, not including the outer circle, is called the open unit disk, when the circle itself is also included it is referred to as the closed unit disk.
<!-- The article goes here, in GitHub-flavored Markdown. Feel free to add YouTube videos, images, and CodePen/JSBin embeds -->
#### More Information:
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### More Informaction
https://en.wikipedia.org/wiki/Unit_circle