Cotangent Definition (Illustrated Mathematics Dictionary)

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Math is Fun ABCDEFGHIJKLMNOPQRSTUVWXYZ Definition of Cotangent more ... Cotangent

In a right angled triangle, the cotangent of an angle is:

The length of the adjacent side divided by the length of the side opposite the angle.

The abbreviation is cot

cot(θ) = adjacent / opposite

It is not commonly used, and is equal to 1/tangent

../geometry/images/triangle-q.js?mode=cot See: Tangent (function), Right-Angled Triangle, Trigonometry Sine, Cosine, Tangent Copyright © 2025 Rod Pierce

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