TAN(3) | Linux Programmer's Manual | TAN(3) |
NAME
tan, tanf, tanl - tangent functionSYNOPSIS
#include<math.h>
double tan(double x );
float tanf(float x );
long double tanl(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 tan() function returns the tangent of x, where x is given in radians.RETURN VALUE
On success, these functions return the tangent 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.
- Range error: result overflow
- An overflow floating-point exception ( FE_OVERFLOW) is raised.
CONFORMING TO
C99, POSIX.1-2001. The variant returning double also conforms to SVr4, 4.3BSD, C89.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), cos(3), ctan(3), sin(3)COLOPHON
This page is part of release 3.53 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 |