Man Linux: Main Page and Category List

NAME

       cacosh, cacoshf, cacoshl - complex arc hyperbolic cosine

SYNOPSIS

       #include <complex.h>

       double complex cacosh(double complex z);
       float complex cacoshf(float complex z);
       long double complex cacoshl(long double complex z);

       Link with -lm.

DESCRIPTION

       The  cacosh()  function calculates the complex arc hyperpolic cosine of
       z.  If y = cacosh(z), then z = ccosh(y).  The imaginary part  of  y  is
       chosen  in  the  interval  [-pi,pi].   The  real  part  of  y is chosen
       nonnegative.

       One has:

           cacosh(z) = (0.5) * clog((1 + z) / (1 - z))

VERSIONS

       These functions first appeared in glibc in version 2.1.

CONFORMING TO

       C99.

SEE ALSO

       acosh(3), cabs(3), cimag(3), complex(7)

COLOPHON

       This page is part of release 3.24 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                         CACOSH(3)