If f(x)=[tan^(2)x] then (where [ast] den...

If `f(x)=[tan^(2)x]` then (where `[ast]` denotes the greatest integer function)

A

`Lim_(xto0)f(x)"does not exist"`

B

f(x) is continuous at x = 0

C

f(x) is non-differentiable at x = 0

D

f(0) = 1

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