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Assertion (A ) : The maximum value of 2...

Assertion (A ) : The maximum value of `2 cos^(2) theta + sqrt(5) cos theta sin theta + 4 sin^(2) theta ` is `(9)/(2)`
Reason (R ) : The maximum value of `acos^(2) theta + b cos theta sin theta + c sin^(2) theta ` is`(1)/(2) [ (a+c) + sqrt((a-c)^(2) + b^(2))]`

A

A is true R is true and R is correct explanation of A

B

A is true R is true and R is not correct explanatin of A

C

A is true R is false

D

A is false R is true .

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