The unit circle is defined as a circle of radius 1, centred on the origin. The circumference around a circle is given by \(C = 2\pi{r}\). As the radius of the unit circle is 1, the circumference is ...

Ne’Kiya Jackson and Calcea Johnson, both students at St. Mary’s Academy in New Orleans, presented a trigonometry-based proof of the Pythagorean theorem—something long believed to be impossible due to ...