NAME

     tan - tangent function

SYNOPSIS

     #include <math.h>

     double tan(double x);

DESCRIPTION

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

CONFORMING TO

     SVID 3, POSIX, BSD 4.3, ISO 9899

SEE ALSO

     acos(3), asin(3), atan(3),