Dictionary

trigonometric function

noun

Definition of TRIGONOMETRIC FUNCTION

1
:  a function (as the sine, cosine, tangent, cotangent, secant, or cosecant) of an arc or angle most simply expressed in terms of the ratios of pairs of sides of a right-angled triangle —called also circular function
2
:  the inverse (as the arcsine, arccosine, or arctangent) of a trigonometric function

First Known Use of TRIGONOMETRIC FUNCTION

1909

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May 29, 2015
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