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2024-11-18 11:05:09 -07:00

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The Law of Cosines is useful when solving for SAS or SSS triangles.

a^2 = b^2 + c^2 -2bc\cos(\alpha) b^2 = a^2 + c^2 -2ac\cos(\beta) c^2 = a^2 + b^2 -2ab\cos(\gamma)
  • When using the Law of Cosines to solve for SSS triangles, start solving for the largest angle.
  • When correctly solved, the smallest angle will be opposite the smallest side, and the largest angle will be opposite the largest side.