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arc cosine

noun

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.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

arc cosine in Science

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.