If f(theta)=|{:(1,tantheta,1),(-tantheta...

If `f(theta)=|{:(1,tantheta,1),(-tantheta,1,tantheta),(-1,-tantheta,1):}|` then the set `{f(theta):0lt=thetalt(pi)/(2)}` is

A

`(-oo,-1)cup(1,oo)`

B

`[2,oo)`

C

`(-oo,0]cup[2,oo)`

D

`(-oo,-1]cup[1,oo)`

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The correct Answer is:

B

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