cofunction

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noun co·func·tion \ˈkō-ˌfəŋ(k)-shən\

Definition of cofunction

  1. :  a trigonometric function whose value for the complement of an angle is equal to the value of a given trigonometric function of the angle itself the sine is the cofunction of the cosine

1909

First Known Use of cofunction

1909

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capable of being altered or controlled

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