Complete the Identity $$\frac { \sin ( \alpha - \beta ) } { \sin ( \alpha + \beta ) } = ?$$

question 174

Multiple Choice

Complete the identity.
- $$\frac { \sin ( \alpha - \beta ) } { \sin ( \alpha + \beta ) } = ?$$

• A) \(\frac { \tan \alpha \tan \beta - 1 } { \tan \alpha \tan \beta + 1 }\)
• B) \(\frac { \tan \alpha - \tan \beta } { \tan \alpha + \tan \beta }\)
• C) -1
• D) \(\frac { \sin \alpha - \sin \beta } { \sin \alpha + \sin \beta }\)

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