Cofunction meaning

kō'fŭngk'shən
The trigonometric function of the complement of an angle.

The tangent is the cofunction of the cotangent.

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The trigonometric function of the complement of an angle. The tangent, for example, is the cofunction of the cotangent.
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(mathematics) The trigonometric function of the complement of the supplied angle (thus cosine and sine are each other's cofunctions)
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