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NAME

       ccos, ccosf, ccosl - complex cosine function

SYNOPSIS

       #include <complex.h>

       double complex ccos(double complex z);
       float complex ccosf(float complex z);
       long double complex ccosl(long double complex z);

       Link with -lm.

DESCRIPTION

       The complex cosine function is defined as:

           ccos(z) = (exp(i * z) + exp(-i * z)) / 2

VERSIONS

       These functions first appeared in glibc in version 2.1.

CONFORMING TO

       C99.

SEE ALSO

       cabs(3), cacos(3), csin(3), ctan(3), complex(7)

COLOPHON

       This  page  is  part of release 3.35 of the Linux man-pages project.  A
       description of the project, and information about reporting  bugs,  can
       be found at http://man7.org/linux/man-pages/.

                                  2008-08-11                           CCOS(3)