Simplify the Expression $$\frac { \cos x } { \tan ^ { 2 } x } - \frac { \cos x } { \sin ^ { 2 } x }$$

Multiple Choice

Simplify the expression.
- $$\frac { \cos x } { \tan ^ { 2 } x } - \frac { \cos x } { \sin ^ { 2 } x }$$

A) $- \cos x$
B) $- \sin x$
C) $\sin x$
D) $\cos x$