The conversation between human and AI assistant.
How can you find the tangent line of a circle?
Can you explain the point-slope form of the equation?
The point-slope form of a line is y - y1 = m(x - x1), where (x1, y1) is the point on the line and m is the slope of the line. In the case of the tangent line, (x1, y1) is the point of tangency on the circle and m is the derivative of the circle equation at that point.