What are trigonometric functions in mathematics?
The basic ones are:
sine, cosine, tangent, cosecant, secant, cotangent;
Less common ones are:
arcsine, arccosine, arctangent, arccosecant, arcsecant,
arccotangent;
hyperbolic sine, hyperbolic cosine, hyperbolic tangent,
hyperbolic cosecant, hyperbolic secant, hyperbolic cotangent;
hyperbolic arcsine, hyperbolic arccosine, hyperbolic arctangent,
hyperbolic arccosecant, hyperbolic arcsecant, hyperbolic
arccotangent.