plural of cofunction

(mathematics) The trigonometric function of the complement of the supplied angle. / (programming) A costatement that takes the form of a function and can accept parameters and return a value.

Relating to a cofunction or to cofunctionality

plural of trigonometric cofunction

(mathematics) Either of a pair of trigonometric functions that have equal values when their arguments are complementary angles, e.g. sine and cosine.