QUESTION 2 Find a general solution to the following ODE: d df [sing der] + [n(n+1) sing]f =0. dep 0≤ 4≤ Hint: Do a change of variables u-coso using the Chain R O a. f = A P (cosp) + A Q (cosy) n n O b. f =AJ n (cos(p) O c. f = AY (sing) n O d. f = K P (cos(p) n n Oe. A p"+¹(cos) + B Q"+¹(cosa) +1 n

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