Question Number 38205 by prof Abdo imad last updated on 22/Jun/18
$${if}\:\:\frac{\mathrm{1}}{{sinx}}\:=\sum_{{n}=\mathrm{1}} ^{\infty} \:{a}_{{n}} {sin}\left({nx}\right)\:\:{find}\:{the}\:{values}\:{of} \\ $$$${a}_{{n}} . \\ $$
if-1-sinx-n-1-a-n-sin-nx-find-the-values-of-a-n-