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arc sine

noun, Trigonometry.
the angle, measured in radians, that has a sine equal to a given number. Symbol: sin −1.
Abbreviation: arc sin;
Also called inverse sine.
Origin of arc sine
1905-10 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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arc-sine in Science
arc sine  
The inverse of the sine function.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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