Hello,

I have an assignment where one of the questions is to find parametric equations for the tangent lines to a circle x^2 + y^2 = 1 which pass through (2, 0).

I have tried finding dy/dx via implicit differentiation, and I get dy/dx = -x/y, which is not defined for (2, 0), right?

At this point I get stuck, and am not sure where to go, so any hints or insights would be helpful.

Thanks.