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);

Link with -lm.

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 (nega- tive infinity) is returned.

ERRORS No errors occur.

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

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

COLOPHON This page is part of release 3.22 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.

GNU 2008-08-05 ASINH(3)