Explore the Law of Cosines and its applications in trigonometry through this comprehensive 56-minute pre-calculus lesson. Learn how to apply the Law of Cosines to find missing measures in triangles given SSS (Side-Side-Side) and SAS (Side-Angle-Side) scenarios. Discover Heron's formula for calculating triangle area and tackle word problems involving bearings. Benefit from clear explanations, practical examples, and step-by-step problem-solving techniques designed to make complex trigonometric concepts accessible. Gain confidence in using calculators for efficient problem-solving and enhance your understanding of trigonometry's real-world applications.