Name

sinh, cosh, tanh − hyperbolic functions

Syntax

#include <math.h>

double sinh(x)

double cosh(x)
double x;

double tanh(x)
double x;

Description

These functions compute the designated hyperbolic functions for real arguments. 

Return Values

The sinh and cosh functions return HUGE_VAL and set errno to ERANGE when the correct value would overflow. 

Environment

When your program is compiled using the System V environment, sinh and cosh return HUGE (and sinh may return HUGE or negative x ) when the correct value would overflow and set errno to ERANGE. 

These error-handling procedures may be changed with the function matherr(.).