Continuity and DifferentiabilityMedium

Question

Let [x] denotes the greatest integer less than or equal to x and ƒ(x) = [tan2 x]. Then-

Options

A.ƒ(x) does not exist 
B.ƒ(x) is continuous at x = 0
C.ƒ(x) is not differentiable at x = 0
D.ƒ(0′) = 1.

Solution

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