Equation of a Tangent Line from a Point on the Circle
How to find the equation of a tangent line from a point on the circle: example and its solution.
Draw a radius that meets the tangent line at P(3, 1):
Find the slope of OP:
mOP = 1/3.
So m = -3.
And the tangent line passes through P(3, 1).
Then y - 1 = -3(x - 3).