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Evaluate the Integral π/27π/27sec39xdx\int _ { - \pi / 27 } ^ { \pi / 27 } \sec ^ { 3 } 9 x d x

Question 434

Multiple Choice

Evaluate the integral.
- π/27π/27sec39xdx\int _ { - \pi / 27 } ^ { \pi / 27 } \sec ^ { 3 } 9 x d x
Give your answer in exact form.


A) 39+118ln(7+43) \frac { \sqrt { 3 } } { 9 } + \frac { 1 } { 18 } \ln ( 7 + 4 \sqrt { 3 } )
B) 239+118ln(23) \frac { 2 \sqrt { 3 } } { 9 } + \frac { 1 } { 18 } \ln ( 2 \sqrt { 3 } )
C) 29+118ln4\frac { 2 } { 9 } + \frac { 1 } { 18 } \ln 4
D) 239+118ln(7+43) \frac { 2 \sqrt { 3 } } { 9 } + \frac { 1 } { 18 } \ln ( 7 + 4 \sqrt { 3 } )

Correct Answer:

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