1. The problem statement, all variables and given/known data What ques does one need to recognize they need to divide components of two vectors together to "relate the tangents?" 3. The attempt at a solution Alright, so I've seen this come up a LOT in the semester-dividing components or sums of components together to work out an equation in terms of tangents and to eliminate variables. The thing is my professor and the book we're using don't explain this, and when it's used nobody elaborates. Getting my professor to respond to a question results in a "google it" response. So tell me what I'm missing guys. When are you even supposed to use this trick. I know there needs to be some indication of work, but all I can say is I've googled, asked around, and done plenty of logistics trying to figure this out, and it's too frustrating to continue on my own. If you're wondering how I've gotten this far into the semester without knowing this, it hasn't come up on tests, only on one or two hw assignments. But it bugs me.