Using $$\tan (A - B) = \frac{\tan A - \tan B}{1+\tan A \tan B}$$, find the value of $$\tan 15^{\circ}$$.

A

$$\surd{3} + 1$$

B

$$\surd{3} - 1$$

C

$$2 - \surd{3}$$

D

$$2 + \surd{3}$$