Use the Product-To-Sum Formulas to Rewrite the Product as a Sum

question 2

Short Answer

Use the product-to-sum formulas to rewrite the product as a sum or difference.
​ $\sin \left( \frac { \pi } { 5 } \right) \cos \left( \frac { \pi } { 10 } \right)$ ​

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Definitions:

Variable Costs

Expenses that change in proportion to the activity or volume of a business.

Substitute Products

Goods or services that can be used in place of another, offering consumers alternatives based on preference, price, or availability.

Complementary Products

Goods or services that are used together, enhancing the value or utility of each other.

Blu-ray Players

Devices designed to play Blu-ray discs, which offer high-definition video and high-quality audio.