NAME

sinh, cosh, tanh − hyperbolic functions

SYNOPSIS

#include <math.h>

double sinh (x)
double x;

double cosh (x)
double x;

double tanh (x)
double x;

DESCRIPTION

Sinh, cosh, and tanh return respectively the hyberbolic sine, cosine and tangent of their argument. 

DEPENDENCIES

Series 800 (/lib/libm.a and ANSI C /lib/libM.a)
When x is ±INFINITY , sinh returns ±INFINITY respectively. 

When x is ±INFINITY , cosh returns +INFINITY . 

When x is ±INFINITY , tanh returns ±1.0 respectively. 

ERRORS

Series 300
Sinh and cosh return HUGE_VAL (and sinh may return −HUGE_VAL for negative x) and set errno to ERANGE when the correct value would overflow. 

Series 800 (/lib/libm.a and ANSI C /lib/libM.a)
Sinh and cosh return HUGE_VAL (and sinh may return −HUGE_VAL for negative x) and set errno to ERANGE when the correct value would overflow. 

Sinh, cosh and tanh return NaN and set errno to EDOM when x is NaN. 

These error-handling procedures may be changed with the function matherr(3M).

SEE ALSO

isinf(3M), isnan(3M), matherr(3M). 

STANDARDS CONFORMANCE

sinh: SVID2, XPG2, XPG3, POSIX.1, FIPS 151-1, ANSI C

cosh: SVID2, XPG2, XPG3, POSIX.1, FIPS 151-1, ANSI C

tanh: SVID2, XPG2, XPG3, POSIX.1, FIPS 151-1, ANSI C

Hewlett-Packard Company  —  HP-UX Release 7.0: Sept 1989