int(0)^(pi//6)(2+3x^(2))cos3x dx=...

`int_(0)^(pi//6)(2+3x^(2))cos3x dx=`

A

`1/36 (pi + 16)`

B

`1/36(pi-16)`

C

`1/36 (pi^2 - 16)`

D

`1/36 (pi^2 + 16)`

Verified by Experts

The correct Answer is:

D

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