Ineed with trigonometry .. specifically the unit circle. if anyone can explain how to find reference angles, cosθ, tanθ, and sinθ message me or something. or let me know in the comments/answers.
dont answer if you can not .

So..hmm notice the picture below

all those are reference angles, of the bigger orange one

a reference angle, is just the angle the terminal point makes, with the x-axis

that angle, is called a reference angle, because, is an equivalent x,y value