summary statistics 145 Chapter summary 149 Multiple-choice questions 150 Short-answer questions 151 Applications of trigonometry 153 Chapter 5 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 Right-angled trigonometry 153 Bearings 158 Trigonometry with obtuse angles The sine rule 166 Area of a triangle 172 The cosine rule 175 Miscellaneous problems 180 Surveying 185 Chapter summary 191 Multiple-choice questions 192 Short-answer questions 193 Multi-stage events 195 163 Chapter 6 6.1 6.2 6.3 6.4 6.5 6.6