hyperbolic cosine

== English == === Noun === hyperbolic cosine (plural hyperbolic cosines) (mathematics) A hyperbolic function that is the analogue of the cosine function for hyperbolic spaces, taking in a hyperbolic angle as an argument and returning the y-coordinate for the corresponding point on the unit hyperbola, symbolically represented as: cosh ⁡ ( x ) = 1 2 ( e x + e − x ) {\displaystyle \cosh(x)={\tfrac {1}{2}}(e^{x}+e^{-x})} . ==== Descendants ==== → Japanese: ハイパボリックコサイン (haipaborikku kosain) ==== Translations ==== === See also === hyperbolic sine hyperbolic tangent