Pronunciation: /'koʊ tæn dʒənt/ ?
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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.[1] In manipulative 1, click on the blue points and drag them to change the figure.

The arccotangent is the functional inverse of cotangent. It is denoted



  1. cotangent. WordNet. Princeton University. (Accessed: 2011-01-08).
  2. Hutton, Charles. A Course in Mathematics, Volume II, 4th edition, pp 2-3. G. & J. Robinson, 1804. (Accessed: 2010-01-21).

More Information

  • McAdams, David. Tangent. All Math Words Encyclopedia. Life is a Story Problem LLC. 2009-03-12.

Cite this article as:

Cotangent. 2010-01-05. All Math Words Encyclopedia. Life is a Story Problem LLC.


Image Credits

Revision History

2010-01-05: Added "References" (McAdams, David.)
2008-11-18: Changed manipulative to GeoGebra (McAdams, David.)
2008-04-30: Initial version (McAdams, David.)

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