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The range of f(theta)=3cos^2theta-8sqrt(...

The range of `f(theta)=3cos^2theta-8sqrt(3) cos theta sin theta + 5 sin^2theta-7` is gven by

A

`[-7,7]`

B

`[-10,4]`

C

`[-4,4]`

D

`[-10,7]`

Text Solution

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The correct Answer is:
B
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