The sides of right-angled triangles are labelled opposite ... The opposite side divided by the hypotenuse is called the sine of the angle, and is abbreviated to sin. For a given angle Ɵ, sinƟ ...

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 ...