By giving evidence or reference,
Who first discovered hyperbolic functions?
As per Wikipedia [1]
Hyperbolic functions were introduced in the 1760s independently by Vincenzo Riccati and Johann Heinrich Lambert.[2]
1.https://en.wikipedia.org/wiki/Hyperbolic_function
2. Robert E. Bradley, Lawrence A. D'Antonio, Charles Edward Sandifer. Euler at 300: an appreciation. Mathematical Association of America, 2007. Page 100.
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