In trigonometry, we are surely to come across the law of sines and law of cosines. However, there is a law of tangent that is never taught in trigonometry. 1. Why is the law of tangents ignored? 2. Solve the following using the law of tangents. In triangle ABC, little a = 321, little b = 234 and angle C = 71°. Find angle A, angle B and little c to the nearest tenth. Note: It is called the Law of Tangents not the Law of Tangent. I forgot the letter "s" in the title for this thread.