Evaluate the integral ∫x^2cos(3x)dx..
Select one:
a. 1/3x^2sin(3x)+2/27sin(3x)−2/9xcos(3x)+C
1/3x^2sin(3x)+2/27sin(3x)−2/9xcos(3x)+C
b. 1/3x^2sin(3x)−2/27sin(3x)+2/9xcos(3x)+C
13x^2sin(3x)−2/27sin(3x)+2/9xcos(3x)+C
c. x/2sin(x)−2/9sin(x)+2/3xcos(x)+C
x^2sin(x)−2/9sin(x)+2/3xcos(x)+C
d. x^2sin(x)+2/9sin(x)−2/3xcos(x)+C
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