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Write the Word or Phrase That Best Completes Each Statement sin⁡(x+y)−sin⁡(x−y)=2cos⁡xsin⁡y\sin ( x + y ) - \sin ( x - y ) = 2 \cos x \sin y

Question 253

Essay

Write the word or phrase that best completes each statement or answers the question.
Establish the identity.
- sin⁡(x+y)−sin⁡(x−y)=2cos⁡xsin⁡y\sin ( x + y ) - \sin ( x - y ) = 2 \cos x \sin y

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