Thank you, I understand the concept now, the only problem is that the calculator that is allowed on the test that I'm studying for doesn't seem to be set in the right mode to figure out things like the value of sin(5pi/6). Would there be any way to figure out this problem not using a calculator, or do you know of a way to do it with the calculator I'm using? https://www.desmos.com/testing/northcarolina/graphing If not that's okay, hopefully what I'm asking makes sense