Express the Sum or Difference as a Product of Sines $\cos ( 6 \theta ) + \cos ( 4 \theta )$

question 136

Multiple Choice

Express the sum or difference as a product of sines and/or cosines.
- $\cos ( 6 \theta ) + \cos ( 4 \theta )$

• A) \(2 \cos ( 5 \theta ) \sin \theta\)
• B) \(2 \cos ( 5 \theta ) \cos \theta\)
• C) \(2 \cos ( 5 \theta )\)
• D) \(2 \sin ( 5 \theta ) \sin \theta\)

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Definitions:

Demand Curve

A graph showing the relationship between the price of a good and the quantity demanded by consumers at various price levels.

Percentage Change

A mathematical calculation that indicates the degree of change over time, expressed as a proportion of the starting value.

Total Revenue

The complete amount of income generated by the sale of goods or services before any expenses are subtracted.