Trigonometry
Learn the basics of trigonometry. Trigonometry will help you solve right angled triangles.
Introduction
Trigonometry is a method of calculating the length of the sides of a right angled triangle. The trigonometrical ratios are sine, cosine and tangent. These are shortened to sin, cos and tan.
You can find the sine, cosine or tangent of any angle on your calculator. You will need to know the following formulas:
Sine = Opposite side ÷ Hypotenuse
Cosine = Adjacent side ÷ Hypotenuse
Tangent = Opposite ÷ Adjacent
Use the arrows to click through the pages to view example problems and practice questions, or click the link below to download a printable copy of these activities.