Question Number 35585 by abdo mathsup 649 cc last updated on 20/May/18
$${let}\:{f}\left({x}\right)=\:\int_{\mathrm{0}} ^{{x}} \:{sin}\left({cost}\right){dt} \\ $$$${developp}\:{f}\:{at}\:{integr}\:{serie} \\ $$
let-f-x-0-x-sin-cost-dt-developp-f-at-integr-serie-