Question Number 93471 by mashallah last updated on 13/May/20
$$\int\mathrm{1}/\mathrm{1}+\mathrm{x2} \\ $$
Answered by Rio Michael last updated on 13/May/20
$$\int\:\frac{\mathrm{1}}{\mathrm{1}\:+\:{x}^{\mathrm{2}} }\:{dx}\:=\:\mathrm{arctan}\:{x}\:+\:{C} \\ $$