Find the Exact Value of the Expression $$\cos ^ { - 1 } \left( - \frac { \sqrt { 2 } } { 2 } \right)$$

Multiple Choice

Find the exact value of the expression.
- $$\cos ^ { - 1 } \left( - \frac { \sqrt { 2 } } { 2 } \right)$$

A) $\frac { 3 \pi } { 4 }$
B) $\frac { \pi } { 4 }$
C) $\frac { - \pi } { 4 }$
D) $\frac { - 3 \pi } { 4 }$