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Support · Mathematics Standard 11–12 – Year 12 – Standard 2 · Trigonometry

Support Apply the cosine rule cos⁡C = (a² + b² - c²)/(2ab) in a given triangle ABC to find the value of an unknown angle

Resources for the prerequisite content of this dot point: earlier-stage (or earlier sub-level) dot points in the same strand that students usually need first. Use these to fill gaps before or alongside the core lesson.

Prerequisite links are draft mappings generated from the syllabus structure (earlier stage, same strand, closest content). They are being reviewed by teachers. Spot a poor match? Tell us.

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Prerequisite dot points

Apply the cosine rule to find the unknown sides for a given triangle ABC.

Stage 5 · Trigonometry C (Path) Draft mapping

Apply the sine rule in a given triangle ABC to find the value of an unknown side

Stage 5 · Trigonometry C (Path) Draft mapping

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

Stage 5 · Trigonometry C (Path) Draft mapping