asinh (3)

#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():

_BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE >= 500 || _XOPEN_SOURCE && _XOPEN_SOURCE_EXTENDED || _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L;

or cc -std=c99

asinhf(), asinhl():

_BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE >= 600 || _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L;

or cc -std=c99

The asinh() function calculates 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.

Multithreading (see pthreads(7))

The asinh(), asinhf(), and asinhl() functions are thread-safe.

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

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

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