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Evaluate the Integral ∫−6xcos⁡9xdx\int - 6 x \cos 9 x d x

Question 154

Multiple Choice

Evaluate the integral.
- ∫−6xcos⁡9xdx\int - 6 x \cos 9 x d x


A) −23cos⁡9x−6xsin⁡9x+C- \frac { 2 } { 3 } \cos 9 x - 6 x \sin 9 x + C
B) −227cos⁡9x−23xsin⁡9x+C- \frac { 2 } { 27 } \cos 9 x - \frac { 2 } { 3 } x \sin 9 x + C
C) −227cos⁡9x−23xsin⁡6x+C- \frac { 2 } { 27 } \cos 9 x - \frac { 2 } { 3 } x \sin 6 x + C
D) −227cos⁡9x−23sin⁡9x+C- \frac { 2 } { 27 } \cos 9 x - \frac { 2 } { 3 } \sin 9 x + C

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