Choose the One Alternative That Best Completes the Statement or Answers

question 205

Multiple Choice

Choose the one alternative that best completes the statement or answers the question.
Complete the identity.
- $\cos ( \alpha + \beta ) \cos ( \alpha - \beta ) =$ ?

• A) \(\cos \left( \alpha ^ { 2 } \right) \cos \left( \beta ^ { 2 } \right) + \sin \left( \alpha ^ { 2 } \right) \sin \left( \beta ^ { 2 } \right)\)
• B) \(2 - \sin ^ { 2 } \alpha - \sin ^ { 2 } \beta\)
• C) \(\cos ^ { 2 } \beta - 2 \sin ^ { 2 } \alpha \sin ^ { 2 } \beta\)
• D) \(\cos ^ { 2 } \beta - \sin ^ { 2 } \alpha\)

---

Definitions:

Moratorium

A period or stage of delay; in developmental psychology, a phase where an individual delays making decisions about identity, often exploring various alternatives.

Self-Disclosure

The process of revealing personal, private information about oneself to others, which can strengthen relationships and build trust.

Status

A social or professional position, standing, or rank of an individual or group within a society.

Suicidal Tendencies

The propensity towards thoughts, ideations, or actions of ending one's own life.