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B
f(x) is continuous at x = pi
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C
f(x) is continuous at x=3π4
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D
f(x) is discontinuous at x=3π4
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Solution
The correct option is C f(x) is continuous at x=3π4 Here f(3π4)=1 and limx→3π4−f(x)=1 limx→3π4+f(x)=limk→02sin29(3π4+h)=2sinπ6=1 Hence f(x) is continuous at x=3π4