Law of sines and cosines

The law of sines is sin(A)/a=sin(B)/b. It is used when you have two angles and one side. The law of cosines is c^2=a^2+b^2-2abcos(C). This is used when you have three sides or two sides and an angle. Both of these are used to find the angles and sides of non-right triangles. Each law can be used in terms of a, b, or c.