trigonometric function (B2)

noun

Pronunciation: ˌtrɪɡəˌnɒmɛtrɪk ˈfʌŋkʃən

Definition

A mathematical relationship that links the angles of a right-angled triangle to the ratios of its side lengths.

Examples

• The sine and cosine are the most fundamental trigonometric functions studied in introductory calculus.

• Engineers apply trigonometric functions to model periodic phenomena like sound waves and alternating current.

• You need to set your calculator to degrees or radians before evaluating any trigonometric function.

How to Use trigonometric function

trigonometric function of [angle] (prepositional phrase)

Relating the function to a specific input angle. — "The sine is a trigonometric function of the angle in a right triangle."

Synonyms of trigonometric function

Words with a similar meaning to trigonometric function:

• trig function
• circular function

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