Two points P1, P2, are on a disk that moves with an angular speed of ipm. The coordinates of those points are P1(×1, y1) and P2(×2, y2) in centimeters. Calculate:

a) Gives a function that describes the vertical displacement of P1, P2 and the sum of the two movements of the points. Graph displacement with GeoGebra in color.

b) The frequency and period of oscillation.

c) Four first positive times in which 90% of the maximum displacement of the sum y3=y1+y2 occurs.

d) Four positive times and the angle at which 93% of the maximum speed of the sum occurs from the third.