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COS(3) | Linux Programmer's Manual | COS(3) |
NAME¶
cos, cosf, cosl - cosine functionSYNOPSIS¶
#include <math.h>double cos(double x);float cosf(float x);long double cosl(long double x);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
_BSD_SOURCE || _SVID_SOURCE ||
_XOPEN_SOURCE >= 600 || _ISOC99_SOURCE ||
_POSIX_C_SOURCE >= 200112L;
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.ERRORS¶
See math_error(7) for information on how to determine whether an error has occurred when calling these functions. The following errors can occur:- Domain error: x is an infinity
- errno is set to EDOM (but see BUGS). An invalid floating-point exception (FE_INVALID) is raised.
CONFORMING TO¶
C99, POSIX.1-2001. The variant returning double also conforms to SVr4, 4.3BSD.BUGS¶
Before version 2.10, the glibc implementation did not set errno to EDOM when a domain error occurred.SEE ALSO¶
acos(3), asin(3), atan(3), atan2(3), ccos(3), sin(3), sincos(3), tan(3)COLOPHON¶
This page is part of release 3.44 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/.2010-09-11 |