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.
critical points f(x)=7cos(x)+4 where x in [pi,3pi]
critical points f(x)=7cos(x)+4 where x in [pi,3pi]
Natural Language
Math Input
Extended Keyboard
