
At the respective max and min values
Given:
The given inverse trigonometric term is:

To find:
The value given inverse trigonometric term.
Solution:
We have,

Using the calculator, we get


The value of given term is 31.1°.
Therefore, the correct option is B.
Eighths and their multiples are common fractions which I recommend memorizing, but to actually solve this, you use the literal meaning of a fraction and divide 5 by 8. See the long-division below (it was surprisingly difficult to type, so I hope it helps!).
To round 0.625 to the nearest hundredth, we go to the second decimal place, which is 5, so we round up to 0.63.