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[Post New]11 Jul 2008 19:50:22 IST
    Subject: Re:z1 and z2 are two complex numbers? Prove Re(z1 z2)=Rez1 Rez2 - Imz1 Imz2
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feynmann (2172)

Forum Expert Blazing goIITian

Olaaa!! Perrrfect answer. 392  [498 rates]
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Hey that's very simple


z1 = x1+iy1 , z2 = x2 +iy2


Now Re(z1z2) = ( x1x2 )- (y1y2) = RHS (proved)
 this reply: 4 points  (with 0 Olaaa!! Perrrfect answer.   in 2 votes )   [?]
 
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