1. The problem statement, all variables and given/known data Find two equations for lines that pass through the point (5,6) and are tangent to 1=x^2+y^2. 2. Relevant equations y=mx +b 3. The attempt at a solution Well, I thought this was going to be an easy one but i'm running out of creativity. I would still like to solve this one so it would be nice if I could get a small shove in the right direction. I starting thinking about the properties of a unit circle in order to locate a point on the circle. I was then planning on taking the derivative at that point to find the slope of the line and construct the equation from there. The problem with that approach is that I am not sure how to figure out what point that is. I am open to trying another approach as well.