Evaluate the integral.

A. x3 cos 9x + x2 sin 9x - x cos 9x -  sin 9x + C
B. x3 sin 9x + x2 cos 9x - x sin 9x -  cos 9x + C
C. x3 sin 9x + x2 cos 9x - x sin 9x -  cos 9x + C
D. x3 sin 9x - x2 cos 9x + x sin 9x +  cos 9x + C

Answer: B

Mathematics

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