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    Command:

    tanl

    
    
    

    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 || _POSIX_C_SOURCE >= 200112L;
               or cc -std=c99
    
    
    

    DESCRIPTION

           The tan() function returns the tangent of x, where x is given in  radi-
           ans.
    
    
    

    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

       Multithreading (see pthreads(7))
           The tan(), tanf(), and tanl() functions are thread-safe.
    
    
    

    CONFORMING TO

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