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man:tanl

TAN(3) Linux Programmer's Manual TAN(3)

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():
         _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L
             || /* Since glibc 2.19: */ _DEFAULT_SOURCE
             || /* Glibc versions <= 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).
     allbox; lbw21 lb lb l l l.  Interface Attribute Value T{ tan(), tanf(),
     tanl() T}   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 4.16 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/.
                                2017-09-15                            TAN(3)
/data/webs/external/dokuwiki/data/pages/man/tanl.txt · Last modified: 2019/05/17 09:32 by 127.0.0.1

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