1. The problem statement, all variables and given/known data While trying to analyze a mechanism, I find I have a complex equation that boils down to a couple of simple-looking equations with two unknowns. I'm under the impression that the ti-89 will solve this sort of set, but I'm having a huge problem figuring it out. The instruction manual isn't being very helpful. Direct help would be wonderful, so would directions to anything online. 2. Relevant equations 7cos(x) + 9cos(y) = -.732 7sin(x) + 9sin(y) = -1.0 3. The attempt at a solution There's another method to do this, but it's rather tedious.