Dictionary.com
Thesaurus.com

arc tangent

American  

noun

Trigonometry.

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

arc tangent Scientific  

  1. The inverse of the tangent function.

Etymology

Origin of arc tangent

First recorded in 1905–10

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.

Vocabulary.com logo
by dictionary.com

Dictionary.com's Learning Companion

Go beyond just looking up words.
Remember them forever with VocabTrainer.

Start training