unit circle


: a circle having a radius of 1

Examples of unit circle in a Sentence

Recent Examples on the Web The area of a unit circle is pi, as Newton well knew, so when x=1, the area under the curve is a quarter of the unit circle, . Steven Strogatz, Quanta Magazine, 31 Aug. 2022 This is the region under the unit circle, defined by y=, that lies above the portion of the horizontal axis from 0 to x. Steven Strogatz, Quanta Magazine, 31 Aug. 2022 Some may fall inside the unit circle, others right on it, and still others outside it. Quanta Magazine, 14 May 2020 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, 14 Mar. 2017

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'unit circle.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1852, in the meaning defined above

Time Traveler
The first known use of unit circle was in 1852

Dictionary Entries Near unit circle

Cite this Entry

“Unit circle.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unit%20circle. Accessed 30 May. 2024.

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