Consider the circle centered at the point (1, 1) whose circumference is 16. Let h = f (d) be the circular function that tracks the height, h, of a point traversing the circle counterclockwise by starting at P0, where d is the distance the point is along the circle from P0. Eight equally spaced points (labelled P0, P1, . . . , P7) are marked around the circle in red below