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[Post New]17 Jun 2008 00:50:17 IST
    Subject: Re:some really good Q.s....
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akku (1142)

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Olaaa!! Perrrfect answer. 188  [289 rates]
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1)-1S+1sinAxsinBx dx=0 s12sinAx sinBx dx=0 s1cos(A-B)x-cos(A+B)x dx=sin(A-B)x-sin(A+B)x=sin(tanA-tanB/2)-sin(tanA+tanB/2)=2cos(tanA)cos(tanB)=2cos2Acos2B ANS




 


 
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