inverses

1. An inverted state: a state in which something has been turned (properly) upside down or inside out or backwards.

   321 is the inverse of 123.

2. The result of an inversion, particularly:
3. A second element which negates a first; in a binary operation, the element for which the binary operation—when applied to both it and an initially given element—yields the operation's identity element, specifically:
4. A morphism which is both a left inverse and a right inverse.
5. The winning of the coup in a game of rouge et noir by a card of a color different from that first dealt; the area of the table reserved for bets upon such an outcome.
6. (Kiowa-Tanoan) A grammatical number marking that indicates the opposite grammatical number (or numbers) of the default number specification of noun class.

verb

To compute the bearing and distance between two points.