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 ...

"There are no trigonometric proofs because all the ... describes the relationship between the three sides of a right-angled ...

Sine and cosine are ratios that are defined in the context of a triangle's right angle, and they can be presented according ...