REVISION NOTES
IGCSE Edexcel Mathematics A
4.8 Trigonometry and Pythagoras’ Theorem
4.8.1 Know, understand and use Pythagoras’ theorem in two dimensions
4.8.2 Know, understand and use sine, cosine and tangent of acute angles to determine lengths and angles of a right-angled triangle
4.8.3 Apply trigonometrical methods to solve problems in two dimensions
4.8.4 Understand and use sine, cosine and tangent of obtuse angles (Higher Tier Only)
4.8.5 Understand and use angles of elevation and depression (Higher Tier Only)
4.8.6 Understand and use the sine and cosine rules for any triangle (Higher Tier Only)
4.8.7 Use Pythagoras’ theorem in three dimensions (Higher Tier Only)
4.8.8 Understand and use the formula ½ab sin C for the area of triangle (Higher Tier Only)
4.8.9 Apply trigonometrical methods to solve problems in three dimensions, including finding the angle between a line and a plane (Higher Tier Only)
