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

question 291

Multiple Choice

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

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

---

Definitions:

Unconscious Motivations

Drives and desires that influence behavior without an individual's conscious awareness, often explored in psychoanalytic theory.

Overt Behaviour

Observable actions or responses of an individual, as opposed to thoughts or feelings which are internal.

Sigmund Freud

An Austrian neurologist and the founder of psychoanalysis, a clinical method for treating psychopathology.

Mental Testing

The practice of administering tests to evaluate cognitive, emotional, and psychological functions and abilities.