PreCalc · Unit 9

Product-to-Sum & Sum-to-Product

Structural tools

Curriculum standard — Represent stage of the Thinking Ladder

Multiple representations

The symbolic form of this concept.

Three pathways, one topic

Study product-to-sum & sum-to-product at three depths

Grade/course-level problems with full understanding.

Parameters, multiple representations, proof, and modeling.

Non-routine problems and competition applications.