# trigonometric function

## trigonometric function

noun Mathematics.
1.
Also called a function of an angle, as sine or cosine, expressed as the ratio of the sides of a right triangle.
2.
any function involving only trigonometric functions and constants.
3.
the generalization of these to functions of real or complex numbers.
Also called trig function (for defs 1, 2).

Origin:
1905–10

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
 trigonometric function —n 1. Also called: circular function any of a group of functions of an angle expressed as a ratio of two of the sides of a right-angled triangle containing the angle. The group includes sine, cosine, tangent, secant, cosecant, and cotangent 2. any function containing only sines, cosines, etc, and constants

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
 trigonometric function   (trĭg'ə-nə-mět'rĭk)  Pronunciation Key  (click for larger image in new window) A function of an angle, as the sine, cosine, or tangent, whose value is expressed as a ratio of two of the sides of the right triangle that contains the angle.
The American Heritage® Science Dictionary