My question is very similar to this one, but I don't know how to modify the answer for an angle not relative to the origin. It's been way to long since math class.
If I have the line that passes through two points, lets say
5,3, and intersects a line at
5,3 with an angle
θ, how do I calculate the slope of the second line? The formula given (
tan(arctan(y/x)−θ)) assumes the angle has a relation to the
x axis, but I need a more general formula.
This image should illustrate the case.
I have known line, and a point at which it intersects another line. If I know the angle formed by the two lines, how can I find the slope of the second line.