The sides of right-angled triangles are labelled opposite, hypotenuse and adjacent. Trigonometry explores the relationship between sides and angles in right-angled triangles. The hypotenuse is the ...

Most trigonometry students look at triangles on a flat surface. However, people from ancient astronomers to modern navigators calculated the arc lengths and angles of triangles on a sphere. They used ...

Working with the graphs of trigonometric functions Working with trigonometric relationships in degrees Using the sine and cosine rules to find a side or angle in a triangle Using bearings in ...