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If (1+tanalpha)(1+tan4alpha)=2,alpha in ...

If `(1+tanalpha)(1+tan4alpha)=2,alpha in (0,pi/(16)),` then `alpha` is equal to `pi/(20)` (b) `pi/(30)` (c) `pi/(40)` (d) `pi/(60)`

A

`( pi )/( 20)`

B

`( pi )/( 30)`

C

`( pi )/( 40)`

D

`( pi)/( 60)`

Text Solution

Verified by Experts

The correct Answer is:
A
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