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Category: Relation and Functions

prove-thst-for-z-C-Z-piz-sin-piz-2-n-1-z-n-2-and-piz-2-sin-2-piz-cos-piz-n-1-n-z-n-2-

Question Number 92933 by mathmax by abdo last updated on 09/May/20 provethstforzCZ(πzsin(πz))2=n=+1(zn)2$${and}\:\:\frac{\left(\pi{z}\right)^{\mathrm{2}} }{{sin}^{\mathrm{2}} \left(\pi{z}\right)}{cos}\left(\pi{z}\right)\:=\sum_{{n}=−\infty} ^{+\infty} \:\frac{\left(−\mathrm{1}\right)^{{n}} }{\left({z}−{n}\right)^{\mathrm{2}} } \