A+b+c=π ,then find the minimum value of cot2a+ cot2b +cot2c
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put a=b=c =60
(in these type of ques usually this trick works (equating all equally) generally not all time)
then answer must be under root(3)....
(in these type of ques usually this trick works (equating all equally) generally not all time)
then answer must be under root(3)....
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hope this solutions will help you
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