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Find xcos(3x)dx\int x \cos ( 3 x ) d x A) 13xsin3x19cos3x+C\frac { 1 } { 3 } x \sin 3 x - \frac { 1 } { 9 } \cos 3 x + C

Question 31

Multiple Choice

Find xcos(3x) dx\int x \cos ( 3 x ) d x


A) 13xsin3x19cos3x+C\frac { 1 } { 3 } x \sin 3 x - \frac { 1 } { 9 } \cos 3 x + C
B) 13xcos3x+19sin3x+C\frac { 1 } { 3 } x \cos 3 x + \frac { 1 } { 9 } \sin 3 x + C
C) 13xsin3x+19cos3x+C- \frac { 1 } { 3 } x \sin 3 x + \frac { 1 } { 9 } \cos 3 x + C
D) 13xsin3x+19cos3x+C\frac { 1 } { 3 } x \sin 3 x + \frac { 1 } { 9 } \cos 3 x + C

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