Find the Exact Value $\csc \left( - \frac { \pi } { 2 } \right)$

question 334

Multiple Choice

Find the exact value. Do not use a calculator.
- $\csc \left( - \frac { \pi } { 2 } \right)$

• A) 1
• B) -1
• C) 0
• D) undefined

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