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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

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       project,  and information about reporting bugs, can be found at http://man7.org/linux/man-
       pages/.

                                            2008-08-11                                  CASINH(3)