2. The angle created by a 15 cm pendulum is given by the equation 0(t) = .2 cos (8t) where 0 is the angular displacement from the vertical in radians. a. How big is the angle at t = 3 seconds? Set calculators to radians ! b. How fast is the angle changing at t = 33. The displacement from equilibrium of an object in harmonic motion on the end of a spring is 0200 D(t) = =cos(12t) -_ sin(12t) where D(t) is time measured in feet and t is the time in seconds. a. What is the position of the object when t = 27 b. How fast is the object moving at t = "? In what direction is it moving? a. How fast is the object moving at t = =? In what direction is it moving