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int tan(x-alpha).tan(x+alpha).tan 2x dx ...

`int tan(x-alpha).tan(x+alpha).tan 2x dx` is equal to

A

`log|(sqrt(sec 2x).sec(x+alpha))/(sec(x-alpha))|+c`

B

`log|(sqrt(sec2x))/(sec(x-alpha).sec(x+alpha))|+c`

C

`log|(sqrt(sec2x).sec(x-alpha))/(sec(x+alpha))|+c`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
B
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