Cosecant Definition (Illustrated Mathematics Dictionary) - Math Is Fun

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

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

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

The abbreviation is csc

csc θ = hypotenuse / opposite

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

../geometry/images/triangle-q.js?mode=csc See: Hypotenuse, Angle, Sine, Trigonometry Sine, Cosine, Tangent Copyright © 2025 Rod Pierce

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