Trigonometry Help: Reference Angles and Quadrants?

I am having a really, really hard time understanding trigonometry, for some reason I am not grasping any of the concepts that are being taught. Unfortunately I have online classes and I don’t have a teacher to try and explain things to me. If you can please help me out on this problem, I would greatly appreciate... show more I am having a really, really hard time understanding trigonometry, for some reason I am not grasping any of the concepts that are being taught. Unfortunately I have online classes and I don’t have a teacher to try and explain things to me. If you can please help me out on this problem, I would greatly appreciate it. Thank you so much for your help in advance.

Find the reference angles (theta) for the angles given below.
Find the quadrants in which the angles lie.
In addition, show all the steps for deriving the answer.

1. (theta) = 50 degrees
2. (theta) = 120 degrees
3. (theta) = 6 (pi) / 7
4. (theta) = 3.3
5. (theta) = 300 degrees
6. (theta) = - 145 degrees