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Which of the following functions have th...

Which of the following functions have their range equal to R(the set of real numbers)?

A

xsinx

B

`[x]/(tan2x)*x in (-pi/4*pi/4)-{0}`, where `[*]` denotes the greatest integer function

C

`x/(sinx)`

D

`[x]+sqrt({x})`, where `{*}`, respectively denote the greatest integer and fractional part functions

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The correct Answer is:
A, D
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