This is a 20-page guide for teachers containing an introduction to the three basic trigonometric ratios. A history of trigonometry concludes the module.
The modules are written for teachers. They provide the mathematical background to help teachers plan the development of topics in their classrooms. This module relates to Module 15: Measurement and Geometry: Pythagoras's theorem - teacher guide and Module 24: Measurement and Geometry: further trigonometry - teacher guide. Together, these modules provide material for teaching the Pythagoras's theorem and trigonometry components of the Australian curriculum for years 9 to 10.