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arc tangent

noun, Trigonometry
1.
the angle, measured in radians, that has a tangent equal to a given number. Symbol: tan −1.
Abbreviation: arc tan;
Also called inverse tangent.
Origin
1905-1910
1905-10
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for arc tangent
  • Compute the mean angle as the arc tangent of y-mean divided by x-mean.
arc tangent in Science
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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