Descartes' Method of Tangents
- gabriela sanchis
The circle through with center intersects the curve at two points and . Drag , the center of the circle, until and coincide. The resulting circle will then be tangent to the curve.
The tangent to the curve is the same as the tangent to the circle, which is perpendicular to the radius. Use this fact to find an equation to the tangent to at . Then again at .