# asinh(3) [redhat man page]

```ASINH(3)						     Linux Programmer's Manual							  ASINH(3)

NAME
asinh - inverse hyperbolic sine function

SYNOPSIS
#include <math.h>

double asinh(double x);

DESCRIPTION
The asinh() function calculates the inverse hyperbolic sine of x; that is the value whose hyperbolic sine is x.

CONFORMING TO
SVID 3, POSIX, BSD 4.3, ISO 9899

acosh(3), atanh(3), cosh(3), sinh(3), tanh(3)

1993-06-13								  ASINH(3)```

## Check Out this Related Man Page

```ASINH(3)						     Linux Programmer's Manual							  ASINH(3)

NAME
asinh, asinhf, asinhl - inverse hyperbolic sine function

SYNOPSIS
#include <math.h>

double asinh(double x);
float asinhf(float x);
long double asinhl(long double x);

Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

asinh(): _BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE >= 500 || _ISOC99_SOURCE; or cc -std=c99
asinhf(), asinhl(): _BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE >= 600 || _ISOC99_SOURCE; or cc -std=c99

DESCRIPTION
The asinh() function calculates the inverse hyperbolic sine of x; that is the value whose hyperbolic sine is x.

RETURN VALUE
On success, these functions return the inverse hyperbolic sine of x.

If x is a NaN, a NaN is returned.

If x is +0 (-0), +0 (-0) is returned.

If x is positive infinity (negative infinity), positive infinity (negative infinity) is returned.

ERRORS
No errors occur.

CONFORMING TO
C99, POSIX.1-2001.  The variant returning double also conforms to SVr4, 4.3BSD, C89.