Question

Apparently sin x = 0,8 has two solutions for 0 < x < pi

How would I go about finding out that x = 0,8 has two solutions? Also, what is meant by pi here? Does it indicate they're using radians?

Answer 1

if they use pi when talking about an angle, they mean radians
(but I think they should label it, but they never do)

to answer you question, the easiest way is memorize what one period of the sin function looks like: