Who invented the unit circle?

The unit circle does not have a known creator but was rather an amalgamation of different ideas from early astronomers and mathematicians. Contributors to the technology include the Babylonians, the Egyptians and the Greeks.

The unit circle is a circle with a radius of 1 and a diameter of 2. It is typically used in trigonometry and calculus. The origin of the unit circle is (0,0), with each zero denoting the values of "x" and "y." The unit circle is commonly learned by high school students in introductory calculus classes, as it is an important element in learning advanced calculus and trigonometry in a college setting.