Students learn how to derive and apply the Cosine Rule to find missing angles in triangles.
Later, as learning progresses students begin to calculate a combination of angles in adjoining triangles.
Differentiated Learning Objectives
- All students should be able to calculate an unknown angle in a triangle using the Cosine rule.
- Most students should be able to calculate an unknown angle or a bearing using the Cosine rule.
- Some students should be able to derive and apply the Cosine rule for triangular shapes.
