trigonometric function

trigonometric function (plural trigonometric functions)

1. (trigonometry) Any function of an angle expressible as the ratio of two of the sides of a right triangle that has that angle (e.g., sine), or that subtracts 1 from such a ratio or subtracts such a ratio from 1 (e.g., coversed sine).

   Hypernym: function

   Coordinate term: antitrigonometric function

   Coordinate term: hyperbolic function

   Hyponyms: cosine function, cotangent function, cosecant function, secant function, sine function, subsine function, tangent function