Question

How do you evaluate `sin^-1(sin (5pi/6))`?

Answer 1

`150^o`

Explanation:

`sin^-1` and `sin` cancel each other out. They are opposite functions - its like multiplying and dividing by the same number.

This just leaves `(5pi)/6`, where `pi` radians is equal to `180^o`, in which case

`(5pi)/6 = (5*180^o)/6 = 900^o/6 = 150^o`