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.
int sech^2(x)*D[sech(x),x]*cos(c*x)*dx
int sech^2(x)*D[sech(x),x]*cos(c*x)*dx
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random