cofunction

[ koh-fuhngk-shuh n ]
/ ˈkoʊˌfʌŋk ʃən /

noun Trigonometry.

the function of the complement of a given angle or arc: cosθ is the cofunction of sinθ.

Origin of cofunction

First recorded in 1905–10; co- + function
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Science definitions for cofunction

cofunction

[ kōfŭngk′shən ]

The trigonometric function of the complement of an angle. The tangent, for example, is the cofunction of the cotangent.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.