theorem is used in solution of triangles, i.e., to find (see Figure 3):
*the third side of a triangle if two sides and the angle between them is known:
*the angles of a triangle if the three sides are known:
*the third side of a triangle if two sides and an angle opposite to one of them is known (this side can also be found by two applications of the law of sines):

These formulas produce high round-off errors