Question Number 113975 by I want to learn more last updated on 16/Sep/20
$$\mathrm{Find}\:\mathrm{the}\:\mathrm{nth}\:\mathrm{term}:\:\:\:\mathrm{1},\:\:\mathrm{0},\:\:−\:\mathrm{1},\:\:\mathrm{0},\:\:\mathrm{1},\:\:\mathrm{0},\:\:−\:\mathrm{1},\:\:\mathrm{0},\:\:... \\ $$
Answered by Olaf last updated on 16/Sep/20
$${u}_{{n}} \:=\:\mathrm{cos}\left({n}\frac{\pi}{\mathrm{2}}\right) \\ $$
Commented by I want to learn more last updated on 17/Sep/20
$$\mathrm{Please}\:\mathrm{workings}\:\mathrm{sir} \\ $$