The Greek letter, Ɵ (theta) is often used as a symbol for an unknown angle. For a right-angled triangle, follow these steps to calculate the length of a side, \(x\), when another side and an ...

The trigonometric ratios sine, cosine and tangent are used to calculate angles and sides in right angled triangles. We are now going to extend trigonometry beyond right angled triangles and use it ...