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

question 11

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) \(2 \sin ( 5 \theta ) \sin \theta\)

---

Definitions:

Deprivation

A state of lacking or being denied something considered to be a necessity or a benefit, often leading to adverse effects on health or well-being.

Needs

Basic requirements for human survival and psychological well-being, such as food, water, and belonging.

Preference

A predilection or inclination for something over others, often reflecting values, desires, or needs.

Motivation Index

A measure or indicator of an individual's level of motivation.