Show that the describing function (DF) of the nonlinearity depicted in the figure below can be expressed by M N(A) where 10-1-0-01 and x(t) = Asin(wt). u M 8 Show that the describing function (DF) of the nonlinearity depicted in the figure below can be expressed by M N(A) where 10-1-0-01 and x(t) = Asin(wt). u M 8