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Complete the Identity $\sec ^ { 4 } \theta - 2 \sec ^ { 2 } \theta \tan ^ { 2 } \theta + \tan ^ { 4 } \theta =$

Question 51

Multiple Choice

Complete the identity.
- $\sec ^ { 4 } \theta - 2 \sec ^ { 2 } \theta \tan ^ { 2 } \theta + \tan ^ { 4 } \theta =$ ?

A) 2
B) $\sec ^ { 2 } \theta \left( 1 + \tan ^ { 2 } \theta \right)$
C) 1
D) $\sec ^ { 2 } \theta + \tan ^ { 2 } \theta$

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