Semivertical angle of a cone of given to...

Semivertical angle of a cone of given total surface area of maximum volume value is

A

`Tan^(-1)((1)/(3))`

B

`Sin^(-1)((1)/(3))`

C

`Cos^(-1) (sqrt(2))`

D

`Tan^(-1)(sqrt(2))`

Verified by Experts

The correct Answer is:

B

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