An Arctangent Identity

Mathematics Magazine 2026

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Authors: Nam  Gu Heo
DOI: 10.1080/0025570x.2025.2597132
Cited by: 0
References: 1

Abstract

Theorem 1. arctan1x+arctan14x3+3x=2arctan12xProof. Let tan α=14x3+3x, tan β=1x, tan θ=12x▪Note: Lehmer [1] presented the arctangent identity arctan1x+arctan14x3+3x=2arctan12x for π. Wu [2] had a v...

Fields of Study & Subjects

Asian American and Pacific Histories Latin American and Latino Studies Short Stories in Global Literature

Publication details

Journal / source
Mathematics Magazine
Volume
99
Issue
1
Pages
89–89
Publication date
1 January 2026
Language
EN