Student Video #4: Unit S Concept 3 - Using power-reducing formulas

• What is this video about?

This video shows how to find the hardest and longest problem from Unit S Concept 3, which is using the power-reducing formulas to make the equation have the highest power of 1. The problem is coming from the SSS packet PQ3 #6. In this video, we will review some algebraic skills, how to use the formulas, and look back at the concept 1 Product to Sum Formulas to solve the problem. There are many ways to solve this; however, the answers must be the same.

• What does the viewer need to pay special attention to in order to understand the concept?

There are some important things that the viewer should notice. The viewers have to focus on the signs when multiplying. Also, they have to notice what they CAN and CANNOT DO. For example, the dangerous part is cos4xcos2x. They should also see how to use knowledge from concept 1 making the part break down even more.