NAME

sinh(), sinhf() − hyperbolic sine functions

SYNOPSIS

#include <math.h>

double sinh(double x);

float sinhf(float x);

DESCRIPTION

sinh() returns the hyperbolic sine of its argument. 

sinhf() is a float version of sinh(); it takes a float argument and returns a float result.  To use this function, compile either with the −Ae option or with the −Aa and −D_HPUX_SOURCE options.  Otherwise, the compiler promotes the float argument to double, and the function returns incorrect results. 

sinhf() is not specified by any standard, but it is named in accordance with the conventions specified in the "Future Library Directions" section of the ANSI C standard. 

To use these functions, link in the math library by specifying −lm on the compiler or linker command line. 

RETURN VALUE

If x is ±INFINITY, sinh() returns ±INFINITY respectively. 

If x is NaN, sinh() returns NaN. 

If the correct value after rounding would be smaller in magnitude than MINDOUBLE, sinh() returns zero. 

If the correct value would overflow, sinh() returns HUGE_VAL (it returns −HUGE_VAL for negative x) and sets errno to [ERANGE]. 

ERRORS

If sinh() fails, errno is set to the following value. 

[ERANGE] The correct value would overflow. 

SEE ALSO

cosh(3M), tanh(3M), isinf(3M), isnan(3M), values(5). 

STANDARDS CONFORMANCE

sinh(): SVID3, XPG4.2, ANSI C

Hewlett-Packard Company  —  HP-UX Release 10.20:  July 1996