Support · Stage 5 · Trigonometry C (Path)
Support Apply the cosine rule to find the unknown sides for a given triangle ABC.
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.
Prerequisite dot points
Apply trigonometry to find the lengths of unknown sides in right-angled triangles with a given angle including angles in degrees and minutes
Stage 5 · Trigonometry A Draft mapping
- Interactive toolStarterMathigon: Trigonometry (interactive course)Use it for: Introduce sine, cosine and tangent as constant ratios in similar right-angled triangles.
- Interactive toolStarterMaths Is Fun: SOHCAHTOAUse it for: Trig ratios with an interactive triangle.
- Corbettmaths practice questions: Trigonometry introductionUse it for: Free printable graded practice questions (with answers) on trigonometry introduction for drill or a quick check.
- WorksheetDrillKuta free worksheet: Trigonometry to find side lengthsUse it for: Printable skills-practice sheet with answer key on trigonometry to find side lengths; good for drill or homework.
- WorksheetDrillTransum: TrigonometryUse it for: Levelled right-angled trig practice.
- VideoStarterCorbettmaths video: Trigonometry missing sidesUse it for: Short worked-example video on trigonometry missing sides to model the method before practice or for flipped revision.
Apply trigonometry to find the size of unknown angles in right-angled triangles including in degrees and minutes
Stage 5 · Trigonometry A Draft mapping
- Corbettmaths practice questions: Trigonometry introductionUse it for: Free printable graded practice questions (with answers) on trigonometry introduction for drill or a quick check.
- WorksheetDrillKuta free worksheet: Trigonometry to find anglesUse it for: Printable skills-practice sheet with answer key on trigonometry to find angles; good for drill or homework.
- WorksheetDrillTransum: TrigonometryUse it for: Levelled right-angled trig practice.
- VideoStarterCorbettmaths video: Trigonometry missing anglesUse it for: Short worked-example video on trigonometry missing angles to model the method before practice or for flipped revision.
Identify the sine, cosine and tangent ratios in a right-angled triangle
Stage 5 · Trigonometry A Draft mapping
- Interactive toolEnrichmentMathigon: Triangles and TrigonometryUse it for: Interactive lessons building to Pythagoras and trig ratios.
- Interactive toolStarterMathsisfun: Sine, cosine, tangentUse it for: Drag a triangle to see ratios stay constant.
- WorksheetDrillKuta free worksheet: Finding trig ratiosUse it for: Printable skills-practice sheet with answer key on finding trig ratios; good for drill or homework.
- WorksheetDrillKuta free worksheet: Trig ratiosUse it for: Printable skills-practice sheet with answer key on trig ratios; good for drill or homework.