Question Number 146277 by mathdanisur last updated on 12/Jul/21
$$\int{cos}\left(\mathrm{2}{x}\right){dx}=? \\ $$
Answered by physicstutes last updated on 12/Jul/21
$$\mathrm{Nice}\:\mathrm{question}.\:\mathrm{lol} \\ $$$$\int\mathrm{cos}\:\left(\mathrm{2}{x}\right)\:{dx}\:=\:\frac{\mathrm{sin}\:\mathrm{2}{x}}{\mathrm{2}}+{k} \\ $$$$\int\mathrm{cos}\:\left({ax}\right){dx}\:=\:\frac{\mathrm{sin}\:{ax}}{{a}}+{k} \\ $$
Commented by mathdanisur last updated on 13/Jul/21
$${thanks}\:{Ser},\:{answer}.? \\ $$