Solution: By definition, $\tan \theta = \frac{\textopposite}{\textadjacent}$. Substituting the given values, $\tan 30^\circ = \frac1{\sqrt3}$. Rationalizing the denominator, $\frac1{\sqrt3} = \frac{\sqrt3}3$. Thus, $\boxed{\dfrac{\sqrt3}3}$. - ToelettAPP