The Unit Circle & The Special Angles

The unit circle below shows the values of the cosine and sine functions (coordinates in blue, with the x-coordinate being the cosine and the y-coordinate is the sine) for the special angles: 0, π/6 (30 °), π/4 (45 °), π/3 (60 °), π/2 (90 °), 2π/3 (120 °), 5π/4 (135 °)