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

       The  casinh()  function  calculates  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.

CONFORMING TO

       C99.

SEE ALSO

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

COLOPHON

       This page is part of release 3.54 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/.

                                                   2008-08-11                                          CASINH(3)