Definition of cofunction in US English:
cofunction
nounˈkōˌfəNG(k)SH(ə)nˈkōˌfəNG(k)SH(ə)n
Mathematics The trigonometric function of the complement of an angle or arc.
Example sentencesExamples
- Students will learn how to write a function in terms of its cofunction or how to solve for an angle given a cofunction equality.
- Students will be able to use reciprocals, quotients, Pythagorean identities, cofunctions, and composite-arguments to prove trig identities.
- Similarly, tan x and cot x are cofunctions of each other, and sec x and csc x are cofunctions of each other.
- There will be a sheet of formulas for trig functions: double and half-angle, cofunctions, addition and subtraction, sum and product.
- The question wants an angle less than 45º, so we use our cofunctions.