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

Question 22

Multiple Choice

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


A) csc(840) =223\csc \left( - 840 ^ { \circ } \right) = - \frac { 2 \sqrt { 2 } } { 3 } cot(840) =22\cot \left( - 840 ^ { \circ } \right) = \frac { \sqrt { 2 } } { 2 }
B) csc(840) =33\csc \left( - 840 ^ { \circ } \right) = \frac { \sqrt { 3 } } { 3 } cot(840) =33\cot \left( - 840 ^ { \circ } \right) = \frac { \sqrt { 3 } } { 3 }
C) csc(840) =22\csc \left( - 840 ^ { \circ } \right) = - \frac { \sqrt { 2 } } { 2 } cot(840) =23\cot \left( - 840 ^ { \circ } \right) = \frac { \sqrt { 2 } } { 3 }
D) csc(840) =13\csc \left( - 840 ^ { \circ } \right) = - \frac { 1 } { 3 } cot(840) =13\cot \left( - 840 ^ { \circ } \right) = \frac { 1 } { 3 }
E) csc(840) =233\csc \left( - 840 ^ { \circ } \right) = - \frac { 2 \sqrt { 3 } } { 3 } cot(840) =33\cot \left( - 840 ^ { \circ } \right) = \frac { \sqrt { 3 } } { 3 }

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