Compound Angle Formulae HL
On this page, we will learn about the compound angle formulae used in trigonometry. These are really important because they open up so many other formulae in trigonometry. In particular, we can derive the double angle formulae. There are six formulae which are written in a shortened form in the IB formula booklet. You need to be very careful with positive and negative signs. Key Concepts On this page, you should...