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The inverse of the tangent function.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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|Noun||1.||arc tangent - the inverse function of the tangent; the angle that has a tangent equal to a given number|
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