Use a calculator to give the real number value. Round the answer to 7 decimal places.
-$$y = \cos ^ { - 1 } ( - 0.9397 )$$
A) $- 0.3492063$
B) $2.7412723$
C) $2.7925484$
D) $2.8285740$

Question

Quizplus · Accepted Answer

The value of $y = \cos^{-1}(-0.9397)$ is the angle whose cosine is $-0.9397$. This angle is in the range $[0, \pi]$ for the inverse cosine function. Calculating this gives approximately $2.7925484$ radians.

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

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