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The maximum values of 3 costheta+5sin(th...

The maximum values of `3 costheta+5sin(theta-(pi)/(6))` for any real value of `theta` is:

A

`sqrt(34)`

B

`sqrt(19)`

C

`(sqrt(79))/(2)`

D

`sqrt(31 )`

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The correct Answer is:
B
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