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 tan ([pi/(19-17)]x-[([2*17*pi]+[pi^2])/(2*(19-17))]) from x=16.5 to x=19.5
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random