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

Question 305

Multiple Choice

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

A) $\cos ^ { 2 } x$
B) $\cot ^ { 2 } x$
C) $\sec ^ { 2 } x$
D) $\sin ^ { 2 } x$

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