9d)++The+laws+of+sines+and+cosines

Trigonometric ratios are used to find the missing side lengths of right triangles. To solve a triangle with no right angle, however, you must know one side length and two other parts of the triangle. In these cases, the Law of Sines and Cosines can be used to solve right triangles.

The Law of Sines can be used to solve oblique triangles when two angles and the length of any side are know, or when the lengths of two sides and an angle opposite one of the sides are known.

The Law of Cosines can be used to solve oblique triangles when two sides and the included angle are known, or when all three sides are known. In this case, you would use the Law of Cosines to find the missing angle measures.



Link 1: [|Law of Sines]

Link 2: [|Law of Cosines]