cofunction

American  

[koh-fuhngk-shuhn] / ˈkoʊˌfʌŋk ʃən /

noun

Trigonometry.

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

   cosθ is the cofunction of sinθ.

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cofunction Scientific  

/ kō′fŭngk′shən /

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

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Etymology

Origin of cofunction

First recorded in 1905–10; co- + function

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Example Sentences

See Examples For:

cofunction

The cofunction identities apply to complementary angles and pairs of reciprocal functions.

From Textbooks ● Feb. 13, 2015

Explain the basis for the cofunction identities and when they apply.

From Textbooks ● Feb. 13, 2015

TRY IT #4 Write in terms of its cofunction.

From Textbooks ● Feb. 13, 2015

If two angles are complementary, the cofunction identities state that the sine of one equals the cosine of the other and vice versa.

From Textbooks ● Feb. 13, 2015

The procedure for secant is very similar, because the cofunction identity means that the secant graph is the same as the cosecant graph shifted half a period to the left.

From Textbooks ● Feb. 13, 2015

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