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Complete the Identity $\csc ^ { 2 } \frac { \theta } { 2 } - \sec ^ { 2 } \frac { \theta } { 2 } = ?$

Question 387

Multiple Choice

Complete the identity.
- $\csc ^ { 2 } \frac { \theta } { 2 } - \sec ^ { 2 } \frac { \theta } { 2 } = ?$

A) $2 \sin ^ { 2 } \theta \sec \theta$
B) $\frac { 2 } { 1 - \sec \theta }$
C) 0
D) $4 \cot \theta \csc \theta$

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