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Where's the Gudermannian? From wikipediophile: "The Gudermannian function, named after Christoph Gudermann (1798–1852), relates the circular functions and hyp
by mjcohen 13y ago
Where's the Gudermannian?
From wikipediophile:
"The Gudermannian function, named after Christoph Gudermann (1798–1852), relates the circular functions and hyperbolic functions without using complex numbers."