method

acosh

v2_5_5 - Show latest stable - 0 notes - Class: CMath

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acosh(z) public

returns the inverse hyperbolic cosine of z

CMath.acosh(1 + 1i) #=> (1.0612750619050357+0.9045568943023813i)

Show source

# File lib/cmath.rb, line 346
  def acosh(z)
    begin
      if z.real? and z >= 1
        RealMath.acosh(z)
      else
        log(z + sqrt(z * z - 1.0))
      end
    rescue NoMethodError
      handle_no_method_error
    end
  end

acosh

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