NAME
        SPAtan - obtain the arctangent of the floating point number
SYNOPSIS
        fnum2 = SPAtan(fnum1);
                       d0.l
        float fnum2;
        float fnum1;
FUNCTION
        Accepts a floating point number representing the tangent
        of an angle and returns the value of said angle in
        radians
INPUTS
        fnum1 - Motorola fast floating point number
RESULT
        fnum2 - Motorola fast floating point number
BUGS
        None
SEE ALSO
        sptan()