**1. **Trigonometric Functions of Compound Angles

**2. **Compound Angle Formulae

**3. **Compound Angle Formulae (A) Sum and Difference Formulae

**11. **Exercise 7.1 P.235

**14. **Exercise 7.2 P.244

**15. **The Subsidiary Angles

**16. **The Subsidiary Angles The expression acos? + bsin?
may always be converted into the forms rsin(? ?a) or rcos(? ??) where r is a positive constant.
a and ? are called the subsidiary angles.

**17. **Exercise 7.3 P.251

**18. **Sums and Products of Trigonometric Functions

**30. **Exercise 7.4 P.257

**31. **Elimination of Angles

**32. **If we have two or more equations, each containing a certain variable, the process of finding an equation from which that variable is excluded is called elimination.

**34. **General Solutions of Trigonometric Equations

**35. **Inverse Trigonometric Functions

**36. **Inverse Trigonometric Functions

**37. **Inverse Trigonometric Functions

**38. **General Solutions

**42. **Exercise 7.5 P.267