trigonometric function


: 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

: 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 Illustration: Rhett Allain This solution includes the trigonometric function cosine. Rhett Allain, WIRED, 14 Mar. 2023 Spacecraft software demands sophisticated mathematical programming, full of matrix operations, trigonometric functions, and multiple precision variables. Frank O’Brien, Ars Technica, 30 Jan. 2020

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'trigonometric function.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1909, in the meaning defined at sense 1

Time Traveler
The first known use of trigonometric function was in 1909

Dictionary Entries Near trigonometric function

Cite this Entry

“Trigonometric function.” Dictionary, Merriam-Webster, Accessed 20 Apr. 2024.

Kids Definition

trigonometric function

: any of a group of functions (as the sine, cosine, and tangent) that for an acute angle are most easily expressed as ratios between the sides of a right triangle containing the angle

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