Find the Exact Value of the Expression $$\frac { \tan 10 ^ { \circ } + \tan 20 ^ { \circ } } { 1 - \tan 10 ^ { \circ } \tan 20 ^ { \circ } }$$

Multiple Choice

Find the exact value of the expression.
- $$\frac { \tan 10 ^ { \circ } + \tan 20 ^ { \circ } } { 1 - \tan 10 ^ { \circ } \tan 20 ^ { \circ } }$$

A) $\frac { 1 } { 2 }$
B) 2
C) $\frac { \sqrt { 3 } } { 3 }$
D) $\sqrt { 3 }$