This video appears on the page: Solving Trig Equations

Solving Really Hard Trig Equations (with factoring!)

If you're lucky, maybe your teacher won't even make you do these, especially if you're not in honors. But for most kids, this will be the worst factoring problems you'll ever see. Stuff like sin2x-2sin+1=0, cos2x+2cosx-3=0, and 3tan2x-4tanx-5=0. (Notice I didn't say worst trig equations, because I'll reserve that honor for equations with a number in front of the x!)