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Let A=pi/7, B =(2pi)/7, C=(4pi)/7 and co...

Let `A=pi/7, B =(2pi)/7, C=(4pi)/7` and `cosA cos B cosC=-1//8`, then `sum tan A tan B`=

A

7

B

`-7`

C

`1//7`

D

1

Text Solution

Verified by Experts

The correct Answer is:
B
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