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

Multiple Choice

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

A) $- 1$
B) $\cos ^ { 2 } x$
C) $\sin ^ { 2 } x$
D) 1