Today Matthew and I drew a unit circle on a coordinate plane and we started with the obvious coordinates (1,0), (0,1), (-1,0), and (0,-1). Next we labeled the multiples of 30 degrees, 45 degrees, and 60 degrees. We considered what those angle measures were in radians and labeled those as well. Next, we proved using the Pythagorean theorem, the coordinates of the multiples of 45 degrees. Matthew was then able to complete the unit circle. Then we related the unit circle back to the x and y values of each point. Matthew recalled that sine goes with y, x goes with cosine and tangent is y/x. He was able to answer questions like sin(pi), cos(300), tan(-45). We will continue with this tomorrow.