Question

How do you evaluate `arccos 0.0127`?

Answer 1

`89^@27; 270^@73`

Explanation:

Use Calculator and unit circle:
cos x = 0.0127 --> arc `x = +- 89^@27`
Answers for (0, 360):
`89^@27 and 270^@73` (co-terminal to -89.27)