arc tangent

noun Trigonometry.

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. 2019

Science definitions for arc tangent

arc tangent

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