arc tangent

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

Origin of arc tangent

First recorded in 1905–10
Also called inverse tangent. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

arc tangent in Science

arc tangent

  1. The inverse of the tangent function.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.