Use Reference Angles to Find the Exact Value of the Expression

Multiple Choice

Use reference angles to find the exact value of the expression. Do not use a calculator.
- $\cot 750 ^ { \circ }$

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