cofunction

[ koh-fuhngk-shuhn ]

noun

, Trigonometry.

1. the function of the complement of a given angle or arc:

   cosθ is the cofunction of sinθ.

cofunction

/ kō′fŭngk′shən /

1. The trigonometric function of the complement of an angle. The tangent, for example, is the cofunction of the cotangent.

Word History and Origins

Origin of cofunction¹

First recorded in 1905–10; co- + function

Related Words

• collude
• conspire
• cooperate
• hook up
• participate