Solve the given differential equation. (The form of yp is given.)D2y + 9y = sin x - 2 (Let yp = A + B sin x + C cos x.)

A. y = c1 sin 3x + c2 cos 3x +  + sin x
B. y = c1 sin 3x + c2 cos 3x -  + sin x
C. y = c1 sin 3x + c2 cos 3x -  - sin x
D. y = c1 sin 3x + c2 cos 3x -  + sin x + cos x

Answer: B

Mathematics

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