Let f(x)=Sec^(-1)[1+cos^(2)x] where [.] ...

Let `f(x)=Sec^(-1)[1+cos^(2)x]` where `[.]` denotes the greatest integer function
I : Domain of `f(x)` is R
II : Range of f(x) is `{Sec^(-1)1, Sec^(-1)2}`

A

domain of f is R

B

domain of f is [1, 2]

C

domain of f is [2, 1]

D

range of f is `{sec^(-1)1, sec^(-1)2}`

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The correct Answer is:

A, D

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