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arc cosine

American  

noun

Trigonometry.

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

arc cosine Scientific  

  1. The inverse of the cosine function.

Etymology

Origin of arc cosine

First recorded in 1905–10

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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.

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