Uh oh! Wolfram|Alpha doesn't run without JavaScript.
Please enable JavaScript. If you don't know how, you can find instructions
here
.
Once you've done that, refresh this page to start using Wolfram|Alpha.
plot 1/2(atan(1/(1+x^2))), -0.13(x-3/2)+0.15
plot 1/2(atan(1/(1+x^2))), -0.13(x-3/2)+0.15
Natural Language
Math Input
Extended Keyboard
