hyperbolic cosine


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Related to hyperbolic cosine: Hyperbolic sine, Inverse hyperbolic cosine

hyperbolic cosine

[¦hī·pər¦bäl·ik ′kō‚sīn]
(mathematics)
A function whose value for the complex number z is one-half the sum of the exponential of z and the exponential of -z. Abbreviated cosh.