If I(n)underset(0)overset(pi//4)inttan^(...

If `I_(n)underset(0)overset(pi//4)inttan^(n)` x dx, where n is a positive interger, then `I_(10)+I_(8)` is

A

`1/9`

B

`1/8`

C

`1/7`

D

9

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The correct Answer is:

A

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