trigonometric function


Definition of trigonometric function

1 : a function (such 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 (such as the arcsine, arccosine, or arctangent) of a trigonometric function

Examples of trigonometric function in a Sentence

Recent Examples on the Web Spacecraft software demands sophisticated mathematical programming, full of matrix operations, trigonometric functions, and multiple precision variables. Frank O’brien, Ars Technica, "A deep dive into the Apollo Guidance Computer, and the hack that saved Apollo 14," 30 Jan. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'trigonometric function.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of trigonometric function

1909, in the meaning defined at sense 1

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The first known use of trigonometric function was in 1909

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Cite this Entry

“Trigonometric function.” Dictionary, Merriam-Webster, Accessed 19 Sep. 2020.

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