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If f:RtoS defined by : f(x)=sinx-sqrt(3)...

If `f:RtoS` defined by : `f(x)=sinx-sqrt(3)cosx+1`, is onto, then the interval of S is :

A

[0,1]

B

[-1,1]

C

[0,3]

D

[-1,3]

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The correct Answer is:
D
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