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.
lim(x\to 0) 2csc^2x-1/2csc^2(x/2)
lim(x\to 0) 2csc^2x-1/2csc^2(x/2)
Natural Language
Math Input
Extended Keyboard
