For this task, students are shown a unit circle in a plane and an angle measured from the x-axis. They must determine the coordinates of the line segment for the angle and answer a question about the sum of the coordinates. The purpose of this task it to use geometry and algebra in order to understand the behavior of the trigonometric function f(x) = sin x + cos x. Aligns with HSG-GPE.B and F-TF.C.