Trigonometry - Sin Cos Tan - Finding missing lengths and angles - Step by step guide

This resource steps students to develop confidence in using use sin / cos / tan to find missing lengths and angles in right angled triangles. Scaffolded activities for the following:

1. Labelling the sides of a right angled triangle (opp, adj, hyp)
2. Investigation on how the ratio between two sides in a right angled triangle gives rise to sin / cos / tan values
3. Using FORMULA TRIANGLES to help with usage of SOH, CAH, TOA formula triangles
4. Finding MISSING LENGTHS in a right angled triangle (with a step by step guide and independence building questions)
5. Finding MISSING ANGLES in a right angled triangle (with a step by step guide and independence building questions)

Working through all resources would require 60-100 minutes.Potentially 2 lessons.

Answers are included for some of the activities and a sin/cos/tan value table for students who don’t have a scientific calculator.