arc tangent

noun Trigonometry.
the angle, measured in radians, that has a tangent equal to a given number. Abbreviation: arc tan; Symbol: tan −1
Also called inverse tangent.


Origin:
1905–10

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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American Heritage
Science Dictionary
arc tangent  
The inverse of the tangent function.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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00:10
Arc tangent is always a great word to know.
So is ort. Does it mean:
a stew of meat, vegetables, potatoes, etc.
a scrap or morsel of food left at a meal.
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