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

Question 115

Multiple Choice

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

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

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