Evaluate the Expressions Using Reference Angles $\csc \left( - 840 ^ { \circ } \right)$

question 22

Multiple Choice

Evaluate the expressions using reference angles. $\csc \left( - 840 ^ { \circ } \right)$ $\cot \left( - 840 ^ { \circ } \right)$

• A) \(\csc \left( - 840 ^ { \circ } \right) = - \frac { 2 \sqrt { 2 } } { 3 }\) \(\cot \left( - 840 ^ { \circ } \right) = \frac { \sqrt { 2 } } { 2 }\)
• B) \(\csc \left( - 840 ^ { \circ } \right) = \frac { \sqrt { 3 } } { 3 }\) \(\cot \left( - 840 ^ { \circ } \right) = \frac { \sqrt { 3 } } { 3 }\)
• C) \(\csc \left( - 840 ^ { \circ } \right) = - \frac { \sqrt { 2 } } { 2 }\) \(\cot \left( - 840 ^ { \circ } \right) = \frac { \sqrt { 2 } } { 3 }\)
• D) \(\csc \left( - 840 ^ { \circ } \right) = - \frac { 1 } { 3 }\) \(\cot \left( - 840 ^ { \circ } \right) = \frac { 1 } { 3 }\)
• E) \(\csc \left( - 840 ^ { \circ } \right) = - \frac { 2 \sqrt { 3 } } { 3 }\) \(\cot \left( - 840 ^ { \circ } \right) = \frac { \sqrt { 3 } } { 3 }\)

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