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Verify That the Equation Is an Identity sin⁡(x+y)−sin⁡(x−y)=2cos⁡xsin⁡y\sin ( x + y ) - \sin ( x - y ) = 2 \cos x \sin y

Question 224

Essay

Verify that the equation is an identity.
- sin⁡(x+y)−sin⁡(x−y)=2cos⁡xsin⁡y\sin ( x + y ) - \sin ( x - y ) = 2 \cos x \sin y

Correct Answer:

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

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