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.

~Wynne