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Verify the Identity sin⁡(α−β)cos⁡(α+β)=sin⁡αcos⁡α−sin⁡βcos⁡β\sin ( \alpha - \beta ) \cos ( \alpha + \beta ) = \sin \alpha \cos \alpha - \sin \beta \cos \beta

Question 77

Essay

Verify the identity.
- sin⁡(α−β)cos⁡(α+β)=sin⁡αcos⁡α−sin⁡βcos⁡β\sin ( \alpha - \beta ) \cos ( \alpha + \beta ) = \sin \alpha \cos \alpha - \sin \beta \cos \beta

Correct Answer:

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\[\begin{array} { l }
\sin ( \alpha - \...

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