I am totally lost in my calculus class and I am supposed to show the class how to work this problem and it's due Friday!!! I have no idea what to do! An observer stands 20m from the bottom of a Ferris wheel on a line that is perpendicular to the face of the wheel, with her eyes at the level of the bottom of the wheel. The wheel revolves at a rate of pi rad/min and the observer's line of sight with a specific seat on the Ferris wheel makes an angle theta with the horizontal. At what time during a full revolution is theta changing most rapidly?