Find an Algebraic Expression That Is Equivalent to the Expression $$\tan \left( \arccos \frac { x } { 6 } \right)$$

Multiple Choice

Find an algebraic expression that is equivalent to the expression..​ $$\tan \left( \arccos \frac { x } { 6 } \right)$$ ​

A) $\frac { \sqrt { 36 - x ^ { 2 } } } { x }$
B) $\frac { 36 - x ^ { 2 } } { x }$
C) $\frac { \sqrt { 36 + x ^ { 2 } } } { x }$
D) $\frac { \sqrt { 36 + x ^ { 2 } } } { 36 + x ^ { 2 } }$
E) $\frac { \sqrt { 36 - x ^ { 2 } } } { 36 - x ^ { 2 } }$