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.
solve cos(w*t)=i(t)*R + 2*L*di % 28t% 29% 2Fdt% 2C% 20i% 280% 29% 20% 3D% 200
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random