Q.
Let [.] denote greatest integer function and f(x)=[tan2x], then
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a
limx→0f(x) does not exist
b
f(x) is continuous atx=0
c
f(x) is not differentiable at x=0
d
f'(0)=1
answer is B.
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Detailed Solution
0≤tan2x<1 when−π4
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