Try isolating one of the functions on one side of the equation, then squaring both sides. You can use the Pythagorean Identity on the isolated function and rearrange to get a quadratic you can solve.
I could kill my math book for not having a similar example. I honestly don't even remember going over this.
cos x+11=sin 3x-9 ; Find x
I think what's really confusing me is the different functions on either side. The book has examples for quadratics, but nothing similar to this. I tried roundabout logic a few times, but I'm still having trouble with the setup/completion.
I don't neccesarily need the answer, but how to solve.