Let $f ( x ) = \ln \sqrt { \sin ( 2 x ) }$

Multiple Choice

Let $f ( x ) = \ln \sqrt { \sin ( 2 x ) }$ Then $f ^ { \prime } ( x )$ is

A) $\sec ( 2 x )$
B) $\tan ^ { 2 } ( 2 x )$
C) $\tan ( 2 x )$
D) $\cot ( 2 x )$
E) $\csc ( 2 x )$