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Question: please write in short 81 and 83 only please do...

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Writing Sums as Products In Exercises 77-84, use the sum-to-product formulas to write the sum or difference as a product. Sp sin(a + β)-sin(α-β) (83. cos(θ + )-co (6-2)PLEASE write in short. 81 and 83 only please do both

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