casinh(3)

NAME

   casinh, casinhf, casinhl - complex arc sine hyperbolic

SYNOPSIS

   #include <complex.h>

   double complex casinh(double complex z);
   float complex casinhf(float complex z);
   long double complex casinhl(long double complex z);

   Link with -lm.

DESCRIPTION

   These  functions  calculate  the  complex arc hyperbolic sine of z.  If
   y = casinh(z), then z = csinh(y).  The imaginary part of y is chosen in
   the interval [-pi/2,pi/2].

   One has:

       casinh(z) = clog(z + csqrt(z * z + 1))

VERSIONS

   These functions first appeared in glibc in version 2.1.

ATTRIBUTES

   For   an   explanation   of   the  terms  used  in  this  section,  see
   attributes(7).

   
   Interface                       Attribute      Value   
   
   casinh(), casinhf(), casinhl()  Thread safety  MT-Safe 
   

CONFORMING TO

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

SEE ALSO

   asinh(3), cabs(3), cimag(3), csinh(3), complex(7)

COLOPHON

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                              2015-04-19                         CASINH(3)

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