HP-UX Reference (11i v1 05/09) - 3 Library Functions N-Z (vol 7)

sinh(3M) sinh(3M)

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 default

-Ae option or with the -Aa and -D_HPUX_SOURCE

options.

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, make sure your program includes <math.h>, and link in the math library by speci-

fying -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.