5.1 
Trigonometric ratios 

5.2 
Sine and cosine rules, area of a triangle 

5.3 
Radians 

5.4 
Arc length, area of a sector 

5.5 
Small angle approximations 

5.6 
Trigonometric graphs, exact values 

5.7 
Reciprocal trigonometric functions 

5.8 
Inverse trigonometric functions 

5.9 
Trigonometric identities 

5.10 
Addition and double angle formulae 

5.11 
Half angle and power reduction formulae 

5.12 
a cosθ + b sinθ 

5.13 
Solve trigonometric equations 

5.14 
Proofs involving trigonometry 

5.15 
Solve problems using trigonometry 
