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Let M and m respectively denote the maxi...

Let M and m respectively denote the maximum and the minimum values of `[f(theta)^2],where f(theta)=sqrt(a^2+cos^2theta+b^2sin^2theta)+sqrt(a^2 sin^2 theta+b^2 cos^2 theta).` Then M-m=

A

`a^2+b^2`

B

`(a-b)^2`

C

`a^2 b^2`

D

`(a+b)^2`

Text Solution

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The correct Answer is:
B
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