Importing R cosine similarity to UNIX? Post: 302771100

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ccos

CCOS(3)                                                      Linux Programmer's Manual                                                     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).

       +-------------------------+---------------+---------+
       |Interface                | Attribute     | Value   |
       +-------------------------+---------------+---------+
       |ccos(), ccosf(), ccosl() | 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 4.15 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/.

                                                                    2017-09-15                                                             CCOS(3)