An equiangular spiral - parametric equation
- Irina Boyadzhiev
An equiangular spiral, also known as a logarithmic spiral is a curve with the property that the angle between the tangent and the radius at any point of the spiral is constant. In polar coordinates: where and are positive real constants. In parametric form: , where and are real constants. Move the point over the spiral to see the constant angle between the radius and the tangent. Consider .