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If [2sinx]+[cosx]=-3 then the range of t...

If `[2sinx]+[cosx]=-3` then the range of the function `f(x)=sinx+sqrt3cosx` in `[0, 2pi]` is, (where [.] denotes the greatest integer function)

A

`(0.2pi)`

B

(-2,-1)

C

(-1.-1/2)

D

None of these

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The correct Answer is:
B
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