NAME

hyperbolic, sinh, cosh, tanh, asinh, acosh, atanh − hyperbolic functions

SYNOPSIS

#include <math.h>

double sinh(double x);

double cosh(double x);

double tanh(double x);

double asinh(double x);

double acosh(double x);

double atanh(double x);

DESCRIPTION

These functions compute the designated direct and inverse hyperbolic functions for real arguments. 

DIAGNOSTICS

These functions handle exceptional arguments in conformance with the SVID (System V Interface Definition). Thus sinh() and cosh() return ±HUGE on overflow, acosh() returns a NaN if its argument is less than 1, and atanh() returns a NaN if its argument has absolute value greater than 1.  In addition, sinh(), cosh(), and tanh() may also set errno and call matherr(3M). 

SEE ALSO

matherr(3M)

SunOS 5.1/SPARC  —  Last change: 30 Apr 1992