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Discussion Response Post to: some really good Q.s....

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17 Jun 2008 01:15:53 IST

Subject: Re:some really good Q.s....

akku (1142)

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3)use this result

(Aa + Bb +Cc)² ( A² + B² + C² ) (a² + b² + c² )

sin²A + sin²2B + sin²3C>=((sinA)a + (2sin2B)b + (3sin3C))²/(a²+4b²+9c²)

=> least value =16d²/(a²+4b²+9c²) ----------

this reply: 5 points (with 1 Olaaa!! Perrrfect answer.

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