from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Any of several single-valued or multivalued functions that are inverses of the tangent function. Symbol: arctan, tan-1

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. the inverse function of the tangent; the angle that has a tangent equal to a given number


arc- +‎ tangent (Wiktionary)


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