Use Identities to Find the Exact Value $\cos \left( - 165 ^ { \circ } \right)$

Multiple Choice

Use Identities to find the exact value.
- $\cos \left( - 165 ^ { \circ } \right)$

A) $\frac { - \sqrt { 6 } - \sqrt { 2 } } { 4 }$

B) $\frac { \sqrt { 2 } - \sqrt { 6 } } { 4 }$

C) $\frac { \sqrt { 6 } + \sqrt { 2 } } { 4 }$

D) $\frac { \sqrt { 6 } - \sqrt { 2 } } { 4 }$