Use the fact that the trigonometric functions are periodic to find the exact value of the expression. Do not use a calculator.
-$\csc 660 ^ { \circ }$
A) $- \sqrt { 2 }$
B) $- \sqrt { 3 }$
C) $- \frac { 1 } { 2 }$
D) $- \frac { 2 \sqrt { 3 } } { 3 }$

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The Answer of Use the fact that the trigonometric functions are periodic to find the exact value of the expression. Do not use a calculator.
-$\csc 660 ^ { \circ }$
A) $- \sqrt { 2 }$
B) $- \sqrt { 3 }$
C) $- \frac { 1 } { 2 }$
D) $- \frac { 2 \sqrt { 3 } } { 3 }$

Use the Fact That the Trigonometric Functions Are Periodic to Find