Man page - tanf(3)

Packages contains this manual

Available languages:

en fr pt_BR es pl ja ru ro de

Manual

tan

NAME
LIBRARY
SYNOPSIS
DESCRIPTION
RETURN VALUE
ERRORS
ATTRIBUTES
STANDARDS
HISTORY
BUGS
SEE ALSO

NAME

tan, tanf, tanl - tangent function

LIBRARY

Math library ( libm , -lm )

SYNOPSIS

#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)):

tanf (), tanl ():
_ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L
|| /* Since glibc 2.19: */ _DEFAULT_SOURCE
|| /* glibc <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE

DESCRIPTION

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).

Image grohtml-196788-1.png

STANDARDS

C11, POSIX.1-2008.

HISTORY

C99, POSIX.1-2001.

The variant returning double also conforms to SVr4, 4.3BSD, C89.

BUGS

Before glibc 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)