CCOS(3)                   (2017-09-15)                    CCOS(3)

     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
          These functions calculate the complex cosine of z.

          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.

     ATTRIBUTES
          For an explanation of the terms used in this section, see
          attributes(7).  allbox; lbw24 lb lb l l l.
          Interface Attribute Value T{ ccos(), ccosf(), ccosl()
          T}   Thread safety  MT-Safe

     CONFORMING TO
          C99, POSIX.1-2001, POSIX.1-2008.

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

     COLOPHON
          This page is part of release 5.10 of the Linux man-pages
          project.  A description of the project, information about
          reporting bugs, and the latest version of this page, can be
          found at https://www.kernel.org/doc/man-pages/.

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