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.
minimize 90 tan(x) + 40cotan(x) for 0 < x < pi/2
minimize 90 tan(x) + 40cotan(x) for 0 < x < pi/2
Natural Language
Math Input
Extended Keyboard