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Evaluate the Integral 3cos43xdx\int 3 \cos ^ { 4 } 3 x d x

Question 72

Multiple Choice

Evaluate the integral.
- 3cos43xdx\int 3 \cos ^ { 4 } 3 x d x


A) 94x+14sin3x+132sin6x+C\frac { 9 } { 4 } x + \frac { 1 } { 4 } \sin 3 x + \frac { 1 } { 32 } \sin 6 x + C
B) 94x+14sin3x+18sin12x+C\frac { 9 } { 4 } x + \frac { 1 } { 4 } \sin 3 x + \frac { 1 } { 8 } \sin 12 x + C
C) 98x+12sin6x+332sin12x+C\frac { 9 } { 8 } x + \frac { 1 } { 2 } \sin 6 x + \frac { 3 } { 32 } \sin 12 x + C
D) 98x+14sin6x+132sin12x+C\frac { 9 } { 8 } x + \frac { 1 } { 4 } \sin 6 x + \frac { 1 } { 32 } \sin 12 x + C

Correct Answer:

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