Find the Inverse Function F-1 of the Function F $$f ( x ) = 4 \tan ( 9 x )$$

Multiple Choice

Find the inverse function f-1 of the function f.
- $$f ( x ) = 4 \tan ( 9 x )$$

A) $f ^ { - 1 } ( x ) = \frac { 1 } { 4 } \tan ^ { - 1 } \left( \frac { x } { 9 } \right)$
B) $f ^ { - 1 } ( x ) = \frac { 1 } { 4 \tan ( 9 x ) }$
C) $f ^ { - 1 } ( x ) = 4 \tan ^ { - 1 } ( 9 x )$
D) $\mathrm { f } ^ { - 1 } ( \mathrm { x } ) = \frac { 1 } { 9 } \tan ^ { - 1 } \left( \frac { \mathrm { x } } { 4 } \right)$