Hi folks,new to the forum and would like to start by asking for help in four trignometry questions,lol!

As the title says, I have to find all solutions within the given range, Ive been racking my brains all day and can't get anywhere. They are as follows:

8.2 tan 2x = 100<x<180

5 cos 8 ( θ - 16) = -130<θ<140

5 sin 6x = -20< x<π

50 sin (3 θ + π/6) = 300<θ<2.5

π = pi (it doesnt appear to be clear the way ive written it

any help would be highly appreciated.

Thanks.