Find the Exact Value of the Expression $\sec ^ { - 1 } ( - 2 )$

Multiple Choice

Find the exact value of the expression.
- $\sec ^ { - 1 } ( - 2 )$

A) $\frac { 2 \pi } { 3 }$
B) $- \frac { 2 \pi } { 3 }$
C) $- \frac { \pi } { 3 }$
D) $\frac { 4 \pi } { 3 }$