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 (sin(0.5x*pi)), (x), (0.5(x+sin(0.5x*pi))) from x=0 to 1
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random