unit circle

noun

Definition of unit circle 

: a circle having a radius of 1

Examples of unit circle in a Sentence

Recent Examples on the Web

Since going a distance π takes you halfway around the unit circle, cos(π)=-1 and sin(π)=0, so eiπ=-1. Lorenzo Sadun, Slate Magazine, "Finding Pi Outside of the Circumference," 14 Mar. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'unit circle.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of unit circle

1852, in the meaning defined above

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The first known use of unit circle was in 1852

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