HP-UX Reference (11i v1 05/09) - 3 Library Functions A-M (vol 6)

asinh(3M) asinh(3M)

NAME

asinh() - inverse hyperbolic sine function

SYNOPSIS

#include <math.h>

double asinh(double x);

DESCRIPTION

The asinh() function computes the inverse hyperbolic sine of its argument.

The ISO/ANSI C committee has approved the

asinh() function for inclusion in the C9X draft standard.

To use this function, compile either with the default

-Ae option or with the -Aa and -D_HPUX_SOURCE

options. Make sure your program includes <

math.h>. Link in the math library by specifying -lm on the

compiler or linker command line.

RETURN VALUE

If x is ±INFINITY,

asinh() returns ±INFINITY respectively.

If x is NaN,

asinh() returns NaN.

ERRORS

No errors are deﬁned.