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tanf (3)
  • tanf (3) ( FreeBSD man: Библиотечные вызовы )
  • tanf (3) ( Русские man: Библиотечные вызовы )
  • >> tanf (3) ( Linux man: Библиотечные вызовы )
  • tanf (3) ( POSIX man: Библиотечные вызовы )
  •  

    NAME

    tan, tanf, tanl - tangent function
     
    

    SYNOPSIS

    #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(): _BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE >= 600 || _ISOC99_SOURCE; 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.

    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
    An invalid floating-point exception (FE_INVALID) is raised.
    Range error: result overflow
    An overflow floating-point exception (FE_OVERFLOW) is raised.

    These functions do not set errno.  

    CONFORMING TO

    C99, POSIX.1-2001. The variant returning double also conforms to SVr4, 4.3BSD, C89.  

    SEE ALSO

    acos(3), asin(3), atan(3), atan2(3), cos(3), ctan(3), sin(3)  

    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


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