The functions describing the horizontal and vertical positions of a point on a circle as a function of angle (cosine and sine ) and those functions
derived from them:

Circular functions are also called trigonometric
functions , and the study of circular functions is called trigonometry .

See also Cosecant ,

Cosine ,

Cotangent ,

Elliptic
Function ,

Generalized Hyperbolic
Functions ,

Hyperbolic Functions ,

Secant ,

Sine ,

Tangent ,

Trigonometric
Functions ,

Trigonometry
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References Abramowitz, M. and Stegun, I. A. (Eds.). "Circular Functions." §4.3 in Handbook
of Mathematical Functions with Formulas, Graphs, and Mathematical Tables, 9th printing.
New York: Dover, pp. 71-79, 1972. Referenced on Wolfram|Alpha Circular Functions
Cite this as:
Weisstein, Eric W. "Circular Functions."
From MathWorld --A Wolfram Web Resource. https://mathworld.wolfram.com/CircularFunctions.html

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