cofunction

co·func·tion

 (kō′fŭngk′shən)

n.

The trigonometric function of the complement of an angle: The tangent is the cofunction of the cotangent.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

cofunction

(ˌkəʊˈfʌŋkʃən)

n

1. a joint function

2. (Mathematics) maths the trigonometric function of the complement of a given angle

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

co•func•tion

(ˈkoʊˌfʌŋk ʃən)

n.

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

[1905–10]

Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.