7.TRIGONOMETRY
7.1.Trigonometrical ratios
7.2.Pythagoras theorem intrigonometry
7.3.Compound angle formulae
7.4.Double angle formulae
7.5.Form of a cosØ
+ bsinØ= c
7.6.Factor formulae
7.7.Sine, and Cosine rules
7.8.Radians and small angles
7.9.Trigonometrical Function
7.10.Inverse trigonometrical functions
