Use a calculator to give the value to the nearest degree.
-$$\theta = \cos ^ { - 1 } ( - 0.3907 )$$
A) $- 67 ^ { \circ }$
B) $113 ^ { \circ }$
C) $110 ^ { \circ }$
D) $115 ^ { \circ }$

Question

Quizplus · Accepted Answer

The value of $\cos^{-1}(-0.3907)$ is approximately $113^\circ$ when calculated using a calculator. This is because the inverse cosine function, $\cos^{-1}$, gives the angle whose cosine is the given number, and in this case, the angle whose cosine is -0.3907 is closest to $113^\circ$.

Use a Calculator to Give the Value to the Nearest θ=cos⁡−1(−0.3907)\theta = \cos ^ { - 1 } ( - 0.3907 )θ=cos−1(−0.3907)

Use a Calculator to Give the Value to the Nearest $\theta = \cos ^ { - 1 } ( - 0.3907 )$