Trigonometry
Trigonometry is a branch of mathematics that investigates the relationship between the sides and angles of a triangle. It can be used to solve many practical problems including heights of trees, widths of rivers, navigation and bearings, angles of elevation or depression and the area of irregular shapes. Commonly trigonometry is associated with right angled triangles, however applications of trigonometry can be applied to non-right angle triangles through the Sine and Cosine rules.
This resource revises Trigonometry and within Trigonometry there are 4 key concepts:
- Finding unknown sides or angles of right-angled triangles
- Angles of elevation or depression
- Bearings and navigation
- Sine and Cosine rules
To determine if this resource will benefit you, start by answering the following questions.
- How do trigonometric ratios help determine the sides and angles of a right-angled triangle?
- What is the difference between angles of elevation and depression, and how are they used in real-world problem-solving?
- When should the Sine Rule be used instead of the Cosine Rule in solving triangle problems?
The answers to these questions are provided on the following pages. Use this resource to refresh your memory, reinforce your understanding of these concepts, and prepare more effectively for university-level learning.