An Application of Geography to Mathematics: History of the Integral of the Secant Posted on 2022/01/25 by Carl Robitaille An Application of Geography to Mathematics: History of the Integral of the Secant How did anyone ever figure out that ∫secθ dθ = ln | sec θ + tan θ | + C ?The surprising answer involves the Mercator map projection! Check out this great short article from @maanow's Mathematics Magazine (1980).https://t.co/pqKsdtDOZW pic.twitter.com/7Pn5QuKHcZ— Patrick Honner (@MrHonner) January 23, 2022