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Simplify the Expression to Either 1 or -1 $\cos \left( \frac { \pi } { 2 } - x \right) \csc ( - x )$

Question 77

Multiple Choice

Simplify the expression to either 1 or -1.
- $\cos \left( \frac { \pi } { 2 } - x \right) \csc ( - x )$

A) $- 1$
B) 1

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