Problem #7: Consider the rst order linear differential equation: 3 (cos x}y' + (sin x)y = 4 cos 3: sin x (a) Which of the following is a suitable choice of integration factor? (b) If in addition we're given the initial condition y(:|r/ 3) = 9, does this initial value problem have a unique solution? (A) No such factor exists (B) tanx (C) 8Six (D) secx (E) cos x (F) e_\" Problem #7(a}: (A) No (B) Yes Problem #7(b}