# Trigonometry – Problems with Right-Angled Triangles

Students learn how to calculate unknown lengths and angles in right-angled triangles using Sin, Cos and Tan.  As learning progresses they are challenged to apply other facts about triangles to solve more complex problems.
##### Differentiated Learning Objectives
• All students should be able to calculate an angle in a right angled triangle using trigonometrical relationships.
• Most students should be able to calculate a combination of angle and length in a right angled triangle using trigonometrical relationships.
• Some students should be able to demonstrate geometrical relationships in right angled triangle using trigonometrical relationships.
SKU: 074

### Mr Mathematics Blog

#### Trigonometric Identities Sin, Cos and Tan

How to introduce the sin, cos and tan trigonometric identities.

#### Calculating a Reverse Percentage

How to teach calculating the original amount after a percentage change.

#### Comparing Datasets using the Mean and Range

The importance of the range when comparing comparing datasets.