Help with cos, sin and tan^-1 (arctan);

Originally Posted by ulillillia

I understand what radians are and how the term is defined. Given a circle with a radius of 1 unit, the angle of one radian is where the circumference would equal one unit (or that of the radius), which is about 57.3 degrees. The degree is based on Earth's orbit around the Sun. It was first believed to be 360 days in the year and that's how the 360-degree circle came about. Search Wikipedia for more details on radians and degrees.

You have a funny habit of stating what we all already know.