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Category: Relation and Functions

let-g-x-2-cos-pix-developp-g-at-fourier-serie-

Question Number 98430 by mathmax by abdo last updated on 13/Jun/20 letg(x)=2cos(πx)developpgatfourierserie Answered by abdomathmax last updated on 13/Jun/20 $$\mathrm{we}\:\mathrm{have}\:\mathrm{g}\left(\mathrm{x}\right)\:=\frac{\mathrm{2}}{\mathrm{cos}\left(\pi\mathrm{x}\right)}\:=\frac{\mathrm{4}}{\mathrm{e}^{\mathrm{i}\pi\mathrm{x}\:} \:+\mathrm{e}^{−\mathrm{i}\pi\mathrm{x}} } \