TAN(3) - Linux man page online | Library functions
Tangent function.
Chapter
2017-09-15
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); Link with -lm. Feature Test Macro Requirements for glibc (see feature_test_macros(7)): tanf(), tanl(): _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L || /* Since glibc 2.19: */ _DEFAULT_SOURCE || /* Glibc versions <= 2.19: */ _BSD_SOURCE || _SVID_SOURCEDESCRIPTION
These functions return the tangent of x, where x is given in radians.RETURN VALUE
On success, these functions return the tangent 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. If the correct result would overflow, a range error occurs, and the functions return HUGE_VAL, HUGE_VALF, or HUGE_VALL, respectively, with the mathematically correct sign.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.ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7). ┌──────────────────────┬───────────────┬─────────┐ │Interface │ Attribute │ Value │ ├──────────────────────┼───────────────┼─────────┤ │tan(), tanf(), tanl() │ Thread safety │ MT-Safe │ └──────────────────────┴───────────────┴─────────┘CONFORMING TO
C99, POSIX.1-2001, POSIX.1-2008. 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 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/.| This manual | Reference | Other manuals |
|---|---|---|
| tan(3) | referred by | acos(3) | asin(3) | atan(3) | atan2(3) | cos(3) | sin(3) | sincos(3) |
| refer to | acos(3) | asin(3) | atan(3) | atan2(3) | attributes(7) | cos(3) | ctan(3) | feature_test_macros(7) | math_error(7) | sin(3) |