Интерактивная система просмотра системных руководств (man-ов) cosl (3) >> cosl ( Linux man: Библиотечные вызовы ) cosl ( POSIX man: Библиотечные вызовы )
NAME
cos, cosf, cosl - cosine function
SYNOPSIS
#include <math.h >
double cos(double x );
float cosf(float x );
long double cosl(long double x );
Link with -lm .
Feature Test Macro Requirements for glibc (see
feature_test_macros
cosf (),
cosl ():
_BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE >= 600 || _ISOC99_SOURCE; or
cc -std=c99
DESCRIPTION
The
cos ()
function returns the cosine of x , where x is
given in radians.
RETURN VALUE
On success, these functions return the cosine of
x .
If
x
is a NaN, a NaN is returned.
If
x
is positive infinity or negative infinity,
a domain error occurs,
and a NaN is returned.
ERRORS
See
math_error
The following errors can occur:
Domain error: x is an infinity
An invalid floating-point exception
(FE_INVALID )
is raised.
These functions do not set
errno .
CONFORMING TO
C99, POSIX.1-2001.
The variant returning
double
also conforms to
SVr4, 4.3BSD.
SEE ALSO
acos asin atan atan2 ccos sin tan
COLOPHON
This page is part of release 3.14 of the Linux
man-pages
project.
A description of the project,
and information about reporting bugs,
can be found at
http://www.kernel.org/doc/man-pages/.
Index
NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ERRORS
CONFORMING TO
SEE ALSO
COLOPHON
