2. The motion of a pendulum is given by the function s(t) = 1.6 cos TC -t |+ 2.2 where s(t) is the 0.8 distance traveled by the pendulum in metres and t is the time in seconds. Determine the instantaneous rate of change, rounded to the nearest tenth, when t=0.4 seconds. [5 Marks] ti = 0. 399 + 2= 0. 401