Question Number 56830 by maxmathsup by imad last updated on 24/Mar/19
$${let}\:{A}_{{n}} =\prod_{{k}=\mathrm{0}} ^{{n}−\mathrm{1}} \:{cos}\left({kx}\right) \\ $$$$\:{find}\:{a}\:{simple}\:{form}\:{of}\:{A}_{{n}} \\ $$
let-A-n-k-0-n-1-cos-kx-find-a-simple-form-of-A-n-