Enrich · Stage 5 · Trigonometry C (Path)

Enrich Apply the sine rule in a given triangle ABC to find the value of an unknown angle (ambiguous case excluded): sin⁡A/a = sin⁡B/b = sin⁡C/c

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  NRICH: Sine Problem
  NRICH (University of Cambridge) · Web page · Free · Link checked 2026-10-15 · Low floor high ceiling, Teacher notes
  Use it for: Low-floor, high-ceiling NRICH task extending this dot point; use for extension or a problem-solving lesson.