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.
cos ( x) , - ( x - pi/2) + ( 1 / 6 ) * ( x - pi/2 ) ³from -pi/2 to 3pi/2
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random