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int(3 "cosec"^2 x +2 sin 3x )dx=...

`int(3 "cosec"^2 x +2 sin 3x )dx=`

A

`3 cot x + 2/3 cos 3x +c`

B

`-(3 cot x+(2)/(3) cos 3x )+C`

C

`3 cot x -(2)/(3) cos 3x +c `

D

None of these

Text Solution

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The correct Answer is:
B
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