CASINH(3)                           Linux Programmer's Manual                           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
       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 3.53 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)