Q.
The minimum value of atan2x+bcot2x equals the maximum value of asin2θ+bcos2θ where a>b>0 then ab is
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a
8
b
2
c
4
d
6
answer is C.
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Detailed Solution
Minimum value of atan2x+bcot2x is 2abAnd maximum value of asin2θ+bcos2θ is a. ∵asin2θ+bcos2θ=(a−b)sin2θ+b According to question, a=2ab∴ a=4b
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