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Integrate : int x^(2)cos^(3)x dx...

Integrate : `int x^(2)cos^(3)x dx`

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The correct Answer is:
`:. " "int x^(2) cos^(3)x dx=(1)/(4)((x^(2))/(3) sin3x+(2x)/(9) cos 3x-(2)/(27) sin3x)+(3)/(4)(x^(2)s in x+2 cos x-2 sinx)+c`.
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