f: R rarr [-1, oo) and f(x)= ln([|sin 2...

`f: R rarr [-1, oo)` and `f(x)= ln([|sin 2 x | + | cos 2 x | ])`( where [.] is the greatest integer function ) Then,

A

`f(x)` has range Z

B

`f(x)` is periodic with fundamental period `pi/4`

C

`f(x)` is invertible in `[0, pi/4]`

D

`f(x)` is into function

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The correct Answer is:

B, D

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