Complete the Sentence So the Result Is an Identity $$- ^ { + \sin ^ { 2 } x = 1 }$$

Multiple Choice

Complete the sentence so the result is an identity. Let x be any real number.
- $$- ^ { + \sin ^ { 2 } x = 1 }$$

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