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

asinh, asinhf, asinhl - inverse hyperbolic sine function

#include <math.h>
double asinh(double x);
float asinhf(float x);
long double asinhl(long double x);

Link with -lm.


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

asinh():

_ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 500 || /* Since glibc 2.19: */ _DEFAULT_SOURCE || /* Glibc versions <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE

asinhf(), asinhl():

_ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L || /* Since glibc 2.19: */ _DEFAULT_SOURCE || /* Glibc versions <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE

These functions calculate the inverse hyperbolic sine of x; that is the value whose hyperbolic sine is x.

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.

No errors occur.

For an explanation of the terms used in this section, see attributes(7).
Interface Attribute Value
asinh (), asinhf (), asinhl () Thread safety MT-Safe

C99, POSIX.1-2001, POSIX.1-2008.

The variant returning double also conforms to SVr4, 4.3BSD.

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

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2017-09-15 GNU