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[Post New]2 May 2008 11:43:36 IST
    Subject: Re:trigo
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hsbhatt (4910)

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Olaaa!! Perrrfect answer. 926  [1066 rates]
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By Cauchy-Schwarz Inequality


(x^2+y^2)(5^2+12^2) \ge (5x+12y)^2


Hence \sqrt{x^2+y^2} \ge \frac{60}{13}


 


 
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