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man:asinh

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():
         _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

DESCRIPTION

     These functions calculate 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.

ATTRIBUTES

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

CONFORMING TO

     C99, POSIX.1-2001, POSIX.1-2008.
     The variant returning double also conforms to SVr4, 4.3BSD.

SEE ALSO

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

COLOPHON

     This  page  is  part of release 4.16 of the Linux man-pages project.  A
     description of the project, information about reporting bugs,  and  the
     latest     version     of     this    page,    can    be    found    at
     https://www.kernel.org/doc/man-pages/.

GNU 2017-09-15 ASINH(3)

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