method

acosh

Importance_0
v1_8_7_330 - Show latest stable - 0 notes - Class: Math
acosh(z) public

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# File lib/complex.rb, line 594
  def acosh(z)
    if Complex.generic?(z) and z >= 1
      acosh!(z)
    else
      log( z + sqrt(z*z-1.0) )
    end
  end
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