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Question

Discuss the continuity of
f(x)=⎪ ⎪⎪ ⎪ sin2x1 cos2xfor0<xπ/2 cosπ2xforπ2<x<π at x=π/2

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Solution

For function to be continuous RHL=LHL at x=π/2.

LHL=limx(π/2)sin2x1cos2x=01(1)=0

RHL=limx(π/2)+cosxπ2x=limx(π/2)+sinx2=12

Since, LHLRHL. So, function is discontinuous at x=π2

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