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.
maximum of (1-cosx)/(1+2*(tanx)^2) with 0 <= x <= pi/2
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random