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Complete the Identity sin⁡(α+β)sin⁡(α−β)=\sin ( \alpha + \beta ) \sin ( \alpha - \beta ) =

Question 119

Multiple Choice

Complete the identity.
- sin⁡(α+β) sin⁡(α−β) =\sin ( \alpha + \beta ) \sin ( \alpha - \beta ) = ?


A) cos⁡2β−cos⁡2α\cos ^ { 2 } \beta - \cos ^ { 2 } \alpha
B) sin⁡2α−cos⁡2β\sin ^ { 2 } \alpha - \cos ^ { 2 } \beta
C) cos⁡2β+cos⁡2α\cos ^ { 2 } \beta + \cos ^ { 2 } \alpha
D) sin⁡2β−sin⁡2α\sin ^ { 2 } \beta - \sin ^ { 2 } \alpha

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