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In trigonometry this law, which generalizes the Pythagorean theorem, is a statement about a general triangle, which relates the lengths of its sides to the cosine of a known angle.

  1. The Archimedean Principle
  2. The Law of Adjacent Hypotenuses
  3. The Rule of Three
  4. The Law of Cosines

Answer

The correct answer is D) The Law of Cosines.

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