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If u=sqrt(a^2cos^2theta+b^2sin^2theta)+s...

If `u=sqrt(a^2cos^2theta+b^2sin^2theta)+sqrt(a^2sin^2theta+b^2cos^2theta),` then the difference between maximum and minimum values of `u^2` is

A

`(a+b)^(2)`

B

`2sqrt(a^(2)+b^(2))`

C

`2(a^(2)+b^(2))`

D

`(a-b)^(2)`

Text Solution

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The correct Answer is:
d
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