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If I(n)= int(sin nx)/(cos x)dx, then I(n...

If `I_(n)= int(sin nx)/(cos x)dx`, then `I_(n)=`

A

`(-2)/(n - 1) cos (n - 1) x - l_(n_(-2))`

B

`(2)/(n - 1) cos (n - 1) x + l_(n _( -2))`

C

`(-2)/(n +1) sin (n +1) x - l_(n_(-2))`

D

`(-2)/(n +1)cos (n-1) x - l_(n_(-2))`

Text Solution

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The correct Answer is:
A
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