Find the definite integral x cos3x dx . a) 3x sin 3x +9cos 3x +C b) x x sin 3x+ cos3x+C 9. c) -x sin 3x --cos 3x +C d) -3x sin 3x – 9cos 3x +C e) None of the above

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A: Hey, since there are multiple questions posted, we will answer first question. If you want any…

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