To understand your goals and objectives for this module, click the target. Or read this introduction and jump straight in by using the numbered links at the bottom of your screen.

Introduction

Pupils should understand the trigonometrical relationships in right-angled triangles, and use these to solve problems, including those involving bearings, extend their understanding of trigonometry to angles of any size, and use the sine and cosine rules.

Contents

1. Basic Trigonometry
2. Trigonometrical Functions for Angles of any Size and their Graphs (Higher Level Only)
3. The Area of a Triangle and the Sine and Cosine Rules (Higher Level Only)

Trigonometry in the Right Angled Triangle

The following references will show you all you need to know about trigonometry in the right angled triangle.

Trigonometry - Reference 1
The GCSE Answers tutorial will introduce you to trigonometry and show you how to use trigonometry.

Trigonometry - Reference 2
The GCSE Answers Easy Start Trigonometry will give you some practice at questions.

Trigonometrical Functions for Angles of any Size and their Graphs (Higher Level Only)

The first reference shows you the trig functions for angles of any size. It also shows you the graphs of the trig functions. This reference also goes a bit beyond GCSE and does Sec, Cosec and Tan. You do not need to know these at GCSE.

The second reference shows the graphs again.

Trigonometry for angles of any size and graphs - Reference 1

Trigonometry and graphs - Reference 2

The Area of a Triangle and the Sine and Cosine Rules (Higher Level Only)

The Area of a Triangle, the Sine Rule and the Cosine Rule - Reference 1
The GCSE Answers Site will explain how to use these.

The Area of a Triangle, the Sine Rule and the Cosine Rule - Reference 2
The GCSE Answers Site now gives you some practice. (These questions change every term.)

The Area of a Triangle, the Sine Rule and the Cosine Rule - Reference 3
There is a lot more at this reference than you need but you can see the formulae here.

Objectives

By the end of this module
you should be able to:

	Work confidently with trigonometry and the right angled triangle
	Understand that trigonometry applies to angles of any size
	Recognise and draw trig graphs
	Use the sine and cosine rules and calculate the area of a triangle.