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def definition def or abbrev

hypothesis3

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formal statement (Lean)

  92noncomputable def hypothesis3 : ℝ := phi / Real.sqrt (phi^2 + 1)

proof body

Definition body.

  93
  94/-- Hypothesis 4: cos(θ_W) = √(1 - 1/(φ² + 1))
  95
  96    √(1 - 1/3.618) = √(1 - 0.276) = √0.724 ≈ 0.851
  97
  98    Same as hypothesis 3. -/

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