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Start with the right-angled triangle

Start with the right-angled triangle

Right-angled triangle labelled opposite, adjacent and hypotenuse relative to angle theta

A right-angled triangle has one angle of 90∘90^\circ90∘, usually shown by a small square. The longest side, opposite the right angle, is always the hypotenuse.

SOHCAHTOA (Trigonometry) Lesson

  1. IGCSE
  2. /Maths
  3. /SOHCAHTOA (Trigonometry)

Step-by-step lessons covering CIE IGCSE Maths SOHCAHTOA (Trigonometry) for Core and Extended tier. Each lesson works through exam-style questions in Paper 1 and Paper 3 (Core) or Paper 2 and Paper 4 (Extended) format. Start with the Core-tier fundamentals in number and algebra before moving on to the more demanding Extended-only topics like calculus-adjacent algebra and advanced trigonometry.

Lessons

Reverse PercentagesStandard FormSpeed and DensityChanging the Subject of a FormulaExpanding and Factorising QuadraticsSolving QuadraticsDrawing Quadratic GraphsSimultaneous EquationsSimilar Shapes (Lengths)SOHCAHTOA (Trigonometry)Venn DiagramsData