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.
sqrt(9.81*3.5^2/(2*cos^2(35*pi/180)*(3.1*tan(35*pi/180)-1.6)))
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random