Hello,

I shall post the problem with the answer (s) as a given, but it's more of an explanation on what's just happened from which I'm after.

Anyway:

I'm confused how we compute these angles in a problem like this. It's when the coefficient of x is >1 and the range is bigger than

If I was given a problem like this:

For all positive angles - I would have no problem.

I would be grateful for an explanation on what's going on when it's like the preceding case at the beginning of the thread.

Thank you for your attention.