Find the O.D.E. r(t) = sint GENERAL SOLUTION of y" + w²y = r(t) with the the w = 0.5, 0.9, 1.1, 1.5, 10 Sinusoidal driving force -use Method of undetermined coefficient of Hon Homogenous D.E. 2² +w²=0; =0; 2₁, 22 YN = Pp = Awswt +Bsinut