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Let f(x)=[t a n x[cot x]],x [pi/(12),pi/...

Let `f(x)=[t a n x[cot x]],x [pi/(12),pi/(12)]` , (where [.] denotes the greatest integer less than or equal to`x` ). Then the number of points, where `f(x)` is discontinuous is a. one b. zero`` c. three d. infinite

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