cosh

hyperbolic cosine, complex and imaginary

cosh(z) = cos(z.im)*cosh(z.re) + sin(z.im)*sinh(z.re)i

  1. real cosh(real x)
  2. creal cosh(creal z)
  3. real cosh(ireal y)
    real
    cosh
    (
    ireal y
    )

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