Enrich · Stage 5 · Trigonometry A

Enrich Define the sine, cosine and tangent ratios for angles in right-angled triangles and use trigonometric notation sin⁡θ,cos⁡θ,tan⁡θ

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  NRICH: Same Height
  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.
• Rich taskEnrichmentEarly finishersEnrich
  NRICH: Trig Reps
  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.