Use a calculator to evaluate $\cos ^ { - 1 } ( - 0.81 )$ .Round your answer to two decimal places.
A)0.68
B) $- 0.89$
C)0.72
D) $- 0.94$
E)2.51

Name: Use a calculator to evaluate $\cos ^ { - 1 } ( - 0.81 )$ .Round your answer to two decimal places. A)0.68 B) $- 0.89$ C)0.72 D) $- 0.94$ E)2.51
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Question

Quizplus · Accepted Answer

The correct answer is found by calculating the inverse cosine (or arccos) of -0.81. The value of $\cos^{-1}(-0.81)$ is approximately 2.51 radians when rounded to two decimal places.

Use a Calculator to Evaluate cos⁡−1(−0.81)\cos ^ { - 1 } ( - 0.81 )cos−1(−0.81)

Use a Calculator to Evaluate $\cos ^ { - 1 } ( - 0.81 )$