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مشاهدة النسخة كاملة : Try To solve it If you can ....!



x.users
03-17-2007, 12:43 AM
Sum:n=0--> ∞ [ P^n Cos(nӨ) ] = [ (1 - P Cos(Ө))/(1 – 2 P Cos(Ө) +P^2)]


Prove it . its Optics Theory



Sum:n=0-->∞ [Cos(nӨ)] = [ Sin(NӨ/2) / Sin(Ө/2)]. Cos((N-1)Ө/2)

Prove it. Its Optics Theory


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