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90s Slang You Should Know

arc cosine

Trigonometry. the angle, measured in radians, that has a cosine equal to a given number. Symbol: cos −1.
Abbreviation: arc cos;
Also called inverse cosine.
Origin of arc cosine
First recorded in 1905-10 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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arc cosine in Science
arc cosine  
The inverse of the cosine function.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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