Arccos

Arccos (inverse cosine) is a mathematical function that tells you the angle whose cosine value you know. Cosine relates to the ratio of the adjacent side to the hypotenuse in a right triangle. If you know this ratio, arccos helps you find the actual angle in degrees or radians. It's primarily used in geometry, trigonometry, and various fields like engineering and physics to convert a known ratio back into an angle measurement, providing essential information for calculations involving angles and distances.