9. Given that the perimeter of $\triangle A B C$ is 20, the radius of the inscribed circle is $\sqrt{3}$, and $B C=7$, then the value of $\tan A$ is $\qquad$
As shown in the figure, $x+y+z=10 \Rightarrow x=10-7=3$, thus $\tan \frac{A}{2}=\frac{r}{x}=\frac{\sqrt{3}}{3}$, hence $\frac{A}{2}=30^{\circ} \Rightarrow A=60^{\circ}$. Therefore, $\tan A=\sqrt{3}$.