If 0 le x le (pi)/(3) then range of f(x)...

If `0 le x le (pi)/(3)` then range of `f(x) = sec ((pi)/(6) - x) + sec((pi)/(6)+x)` is

A

`((4)/(sqrt(3)),oo)`

B

`[(4)/(sqrt(3)),oo)`

C

`(0, (4)/(sqrt(3))]`

D

`(0, (4)/(sqrt(3)))`

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The correct Answer is:

B

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