\left. \begin{array} { l l } { ( A ) \sqrt { 3 } \operatorname { tan } ( \frac { \alpha } { 2 } ) - \operatorname { tan } ( \frac { \beta } { 2 } ) = 0 } & { ( B ) \operatorname { tan } ( \frac { \alpha } { 2 } ) - \sqrt { 3 } \operatorname { tan } ( \frac { \beta } { 2 } ) = 0 } \\ { ( C ) \operatorname { tan } ( \frac { \alpha } { 2 } ) + \sqrt { 3 } \operatorname { tan } ( \frac { \beta } { 2 } ) = 0 } & { ( D ) \sqrt { 3 } \operatorname { tan } ( \frac { \alpha } { 2 } ) + \operatorname { tan } ( \frac { \beta } { 2 } ) = 0 } \end{array} \right.

\left. \begin{array} { l l } { ( A ) \sqrt { 3 } \operatorname { tan }

1.	\left. \begin{array} { l l } { ( A ) \sqrt { 3 } \operatorname { tan } ( \frac { \alpha } { 2 } ) - \operatorname { tan } ( \frac { \beta } { 2 } ) = 0 } & { ( B ) \operatorname { tan } ( \frac { \alpha } { 2 } ) - \sqrt { 3 } \operatorname { tan } ( \frac { \beta } { 2 } ) = 0 } \\ { ( C ) \operatorname { tan } ( \frac { \alpha } { 2 } ) + \sqrt { 3 } \operatorname { tan } ( \frac { \beta } { 2 } ) = 0 } & { ( D ) \sqrt { 3 } \operatorname { tan } ( \frac { \alpha } { 2 } ) + \operatorname { tan } ( \frac { \beta } { 2 } ) = 0 } \end{array} \right.
Answer»