arc cosine


Trigonometry. the angle, measured in radians, that has a cosine equal to a given number. Abbreviation: arc cos; Symbol: cos−1

Origin of arc cosine

First recorded in 1905–10
Also called inverse cosine. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Science definitions for arc cosine

arc cosine

The inverse of the cosine function.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.