Year 9 · Maths · beta

Trigonometry

In this unit pupils learn how to recognise the relationship between the unit circle and the trigonometric ratios of sine, cosine and tangent. Pupils then apply this knowledge to solve trigonometric problems.

This is an attributed Oak National Academy lesson sequence, not a completed or academically approved DASKEREL course. Supporting transcripts may depend on video, images, practical equipment or teacher explanation. Follow each lesson’s supervision guidance. For religious education and RSHE, follow the school’s syllabus, policy and safeguarding procedures.

Prior knowledge

  • Label sides in right-angled triangles (opposite, adjacent, hypotenuse)
  • Use sine, cosine and tangent ratios
  • Rearrange and solve trigonometric equations

Source curriculum references

  • Use scale factors, scale diagrams and maps
  • Describe, sketch and draw using conventional terms and notations: points, lines, parallel lines, perpendicular lines, right angles, regular polygons, and other polygons that are reflectively and rotationally symmetric
  • Use the standard conventions for labelling the sides and angles of triangle ABC, and know and use the criteria for congruence of triangles
  • Identify and construct congruent triangles, and construct similar shapes by enlargement, with and without coordinate grids
  • Use Pythagoras’ Theorem and trigonometric ratios in similar triangles to solve problems involving right-angled triangles

Oak source metadata. DASKEREL has not independently verified school-level coverage.

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