Q.2) (3 Marks) An underdamped oscillator is driven by an external force of the form Fext = F,sin(wt). Show that the steady state solution is given by x(t) = A(w) sin (wt ), where A(@) and are identical to the following equations F./m A(@) [(w3 - w?)2 + 4y?w?] 2 tan = w; - w?