A) 6
B) 15
C) 24
D) none of these
Correct Answer: D
Solution :
Using \[A.M.\ge G.M\] \[\Rightarrow \]\[\frac{1}{2}(3{{\tan }^{2}}\theta +12{{\cot }^{2}}\theta )\ge 6\] \[\Rightarrow \]\[3{{\tan }^{2}}\theta +12{{\cot }^{2}}\theta \]has minimum value 12.You need to login to perform this action.
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