👉 In mathematics, "rolfe" is a mathematical function that represents the area of a circle. It's also known as the polar radius of a circle, and it's defined by its formula:
```
r = 2
(cos(θ / 2))
```
Where:
- r is the radial distance from the center to any point on the circumference of the circle,
- θ is the angle in radians between the positive x-axis and the line connecting the center of the circle