If $A > 0 , B > 0$ and $A + B = \frac { \pi } { 6 }$, then the minimum positive value of $( \tan A + \tan B )$ is :\\ (1) $\sqrt { 3 } - \sqrt { 2 }$\\ (2) $4 - 2 \sqrt { 3 }$\\ (3) $\frac { 2 } { \sqrt { 3 } }$\\ (4) $2 - \sqrt { 3 }$