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
   (negative 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, C89.

SEE ALSO

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

COLOPHON

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