2. The angle created by a 15 cm pendulum is given by the equation 0 (t) = .2 cos(8t) where 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 = 3 0000 eeee 0000 0000 3. The displacement from equilibrium of an object in harmonic motion on the end of a spring is D(t) = cos(12t) sin(12t) where D(t) is measured in feet and t is the time in seconds. a. What is the position of the object when t = 00002 b. How fast is the object moving at t = ? In what direction is it moving? time a. How fast is the object moving at t = ? In what direction is it moving?