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Test Your Knowledge in Computers #696
Difficulty: Medium
The Cathedral model, in which source code is available with each software release, but code developed between releases, is restricted to an exclusive group of software developers.
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(linux section 3)
man page for ccosf

CCOS(3) 						     Linux Programmer's Manual							   CCOS(3)

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 2017-09-15 CCOS(3)

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