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Evaluate Without Using a Calculator by Using Ratios in a Reference

Question 283

Multiple Choice

Evaluate without using a calculator by using ratios in a reference triangle.
- $\csc 240 ^ { \circ }$

A) $- \frac { 2 \sqrt { 3 } } { 3 }$
B) $- 2$
C) $\frac { 2 \sqrt { 3 } } { 3 }$
D) 2

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