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Question Number 29852 by abdo imad last updated on 13/Feb/18
let f(z) =z cos^2 ((π/z)) find Res(f,0).
$${let}\:{f}\left({z}\right)\:={z}\:{cos}^{\mathrm{2}} \left(\frac{\pi}{{z}}\right)\:\:{find}\:{Res}\left({f},\mathrm{0}\right). \\ $$

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