Inverse Trigonometric Functions

The inverse trigonometric functions, sometimes called the antitrigonometric, cyclometric or arcus functions, are the inverse functions of the ordinary trigonometric functions, defined over suitably restricted domains so that each is single-valued. They are the inverses of the sine, cosine, tangent, cotangent, secant and cosecant functions respectively, and each one recovers an angle from a given value of that angle trigonometric ratio. Because they let a known ratio be converted back into an angle, the inverse trigonometric functions are widely used across engineering, navigation, physics and geometry. This description is adapted from Wikipedia contributors under CC BY-SA 4.0; changes were made. https://creativecommons.org/licenses/by-sa/4.0/