Evaluate the Integral $$\int 2 \cos ^ { 3 } 3 x d x$$

question 13

Multiple Choice

Evaluate the integral.
- $$\int 2 \cos ^ { 3 } 3 x d x$$

• A) \(\frac { 2 } { 3 } \sin 3 x + \frac { 2 } { 9 } \sin ^ { 3 } 3 x + C\)
• B) \(\frac { 2 } { 3 } \sin 3 x - \frac { 2 } { 9 } \cos ^ { 3 } 3 x + C\)
• C) \(\frac { 2 } { 3 } \sin 3 x - \frac { 2 } { 9 } \sin ^ { 3 } 3 x + C\)
• D) \(2 \sin 3 x - \frac { 2 } { 3 } \sin ^ { 3 } 3 x + C\)

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