Applying the law of cosines when no triangle exists

The video tutorial covers solving triangle problems using the laws of sines and cosines. It explains when to use each law, provides formulas for the law of cosines, and guides on selecting the correct formula. An example problem is solved step-by-step, demonstrating the application of the law of cosines and highlighting common mistakes.

How can mistakes in plugging values into a calculator affect the outcome of solving triangle problems?

Describe the process of isolating an angle using the law of cosines.

What happens when the calculated cosine value is outside the valid range for inverse cosine?