Pronunciation: /'koʊ.tæn.dʒənt/ Explain
Abbreviation: cot

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Manipulative 1 - Cotangent Created with GeoGebra.

In right triangle trigonometry, cotangent is defined to be equal to the length of the side adjacent to the angle divided by the length of the side opposite the angle.[2]

The arccotangent is the functional inverse of cotangent. It is denoted arccot() or cot-1().


  1. McAdams, David E.. All Math Words Dictionary, cotangent. 2nd Classroom edition 20150108-4799968. pg 49. Life is a Story Problem LLC. January 8, 2015. Buy the book
  2. Hutton, Charles. A Course in Mathematics, Volume II. 4th edition. pp 2-3. G. & J. Robinson. 1804. Last Accessed 6/25/2018. Buy the book

More Information

  • McAdams, David E.. Tangent. All Math Words Encyclopedia. Life is a Story Problem LLC. 6/27/2018.

Cite this article as:

McAdams, David E. Cotangent. 4/16/2019. All Math Words Encyclopedia. Life is a Story Problem LLC.

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Revision History

4/16/2019: Updated equations and expressions to new format. (McAdams, David E.)
12/21/2018: Reviewed and corrected IPA pronunication. (McAdams, David E.)
6/25/2018: Removed broken links, updated license, implemented new markup, updated GeoGebra apps. (McAdams, David E.)
1/5/2010: Added "References". (McAdams, David E.)
11/18/2008: Changed manipulative to GeoGebra. (McAdams, David E.)
4/30/2008: Initial version. (McAdams, David E.)

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