method

cosh

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cosh(z) private

Returns the hyperbolic cosine of z, where z is given in radians

CMath.cosh(1 + 1i) #=> (0.8337300251311491+0.9888977057628651i)

Show source

# File lib/cmath.rb, line 232
  def cosh(z)
    begin
      if z.real?
        RealMath.cosh(z)
      else
        Complex(RealMath.cosh(z.real) * RealMath.cos(z.imag),
                RealMath.sinh(z.real) * RealMath.sin(z.imag))
      end
    rescue NoMethodError
      handle_no_method_error
    end
  end

cosh

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