Use the Fundamental Identities to Simplify the Expression $$---+ \sin ^ { 2 } x = 1$$

Multiple Choice

Use the fundamental identities to simplify the expression.
- $$---+ \sin ^ { 2 } x = 1$$

A) $\sin ^ { 2 } x$
B) $\csc ^ { 2 } x$
C) $\tan ^ { 2 } x$
D) $\cos ^ { 2 } x$