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Question

The value of limx0tan(πsin2x)+(|x|sin(x[x]))2x2=
(where [.] is greatest integer function)

A
π
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B
0
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C
π+1
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D
Does not exist.
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Solution

The correct option is D Does not exist.
Given : limx0tan(πsin2x)+(|x|sin(x[x]))2x2

L.H.L.=limx0tan(πsin2x)+(xsinx(1))2x2=limx0[tan(πsin2x)πsin2x×πsin2xx2]+[1+sinxx]2=π+(1+1)2=π

R.H.L.=limx0+tan(πsin2x)+(x0)2x2=limx0+tan(πsin2x)πsin2x×πsin2xx2+(1)2=π+(1)2=π+1

L.H.L.R.H.L.
So, limit does not exist.

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