IMSL Fortran Math Special Functions Library
Chapter 2: Trigonometric and Hyperbolic Functions
Routines
Trigonometric Functions
Evaluates tan z for complex z, TAN
Evaluates cot x for real x, COT
Evaluates sin x for x a real angle in degrees, SINDG
Evaluates cos x for x a real angle in degrees, COSDG
Evaluates sin1 z for complex z, ASIN
Evaluates cos1 z for complex z, ACOS
Evaluates tan1 z for complex z, ATAN
Evaluates tan1(x/y) for x and y complex, ATAN2
Hyperbolic Functions
Evaluates sinh z for complex z, SINH
Evaluates cosh z for complex z, COSH
Evaluates tanh z for complex z, TANH
Inverse Hyperbolic Functions
Evaluates sinh1 x for real or complex x, ASINH
Evaluates cosh1 x for real or complex x, ACOSH
Evaluates tanh1 x for real or complex x, ATANH