PRECALCULUS  
UNIT 6: TRIGONOMETRIC OF RIGHT TRIANGLES
6-1 Law of Sines 
When to Use The Law of Sines
The law of sines formula can be used to solve AAS, SSA, and ASA triangles. Please note that when solving the SSA formula using the law of sines, you have an ambiguous case. There could be no solution, one solution, or two triangular solution for a problem in the SSA format. 
Examples on Solving Triangles Using the Law of Sines
6-2 Law of Cosines 
When to Use The Law of Cosines
The law of cosines formula can be used to solve SSS and SAS triangles (Given 3 sides or two sides and an included angle.)
Examples on Solving Triangles Using the Law of Cosines