Trigonometry becomes much easier when students follow a consistent routine. The key is to identify the triangle, label the sides and choose the correct relationship. A related next step is my How to revise for GCSE Maths with a clear plan and confidence guide.
Start with right-angled triangles
Students should be confident with sine, cosine and tangent before moving to more advanced trigonometry. SOHCAHTOA is useful, but only if the sides are labelled correctly. A related next step is my Algebra revision guide.
Check calculator mode
For GCSE and IGCSE, calculators usually need to be in degrees. A wrong mode can make every answer wrong. A related next step is my Avoid these GCSE Maths mistakes to improve your exam performance guide.
Move on to sine and cosine rules
Higher tier students may need the sine rule, cosine rule and area of a triangle. These work best when diagrams are clear. A related next step is my Best GCSE and IGCSE Maths revision guides guide.
Practise exam wording
Trigonometry questions often appear in bearings, 3D shapes and problem-solving contexts. Students need to practise recognising when trig is needed.
