Meaning of ARC in English

ARC

n.

Function: adjective

Etymology: arc sine arc or angle (corresponding to the) sine (of so many degrees)

Date: circa 1949

: INVERSE 2 ― used with the trigonometric functions and hyperbolic functions

Merriam Webster Collegiate English Dictionary.      Merriam Webster - Энциклопедический словарь английского языка.