PHYS 102 | Coulomb's Law 6 - Use That Unit Vector!

You can avoid all the trigonometry if you use the definition of the unit vector.  I show you how here, but you probably won't need this method for most problems. -----Charge! Playlist -    • PHYS 102 | CHARGE!   -----Use the channel, or take the courses at edX - https://www.edx.org/course?search_que... -----This material was produced by Rice Online - http://online.rice.edu