Use a Calculator to Give the Real Number Value $$y = \cos ^ { - 1 } ( - 0.9397 )$$

Multiple Choice

Use a calculator to give the real number value. Round the answer to 7 decimal places.
- $$y = \cos ^ { - 1 } ( - 0.9397 )$$

A) $2.7925484$
B) $2.8285740$
C) $- 0.3492063$
D) $2.7412723$