Choose the One Alternative That Best Completes the Statement or Answers

question 37

Multiple Choice

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

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

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Definitions:

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