A great deal of the material on the law of sines (including the proofs and problems) was taken from Geometry Revisited by H.S.M Coxeter and S.L. Greitzer (1967, The Mathematical Association of America, Inc., Washington , D.C., pp. 1-3). Special thanks to Dr. Jimmy Woods of North Georgia College & State University for introducing me to this excellent book.
The sample problems in the introductory
material on the law of sines and the summary of the ambiguous
case was taken from the textbook Algebra and Trigonometry (3rd
edition) by Roland E. Larson and Robert P. Hostetler (1993,
D.C. Heath and Company, Lexington, MA, pp. 551-554).