Use the product-to-sum or sum-to-product identities to find an identity for the given expression.sin 14? sin 9?

A. (cos -5? + cos 23?)
B. (cos -5? - cos 23?)
C. cos -5? - cos 23?
D. (sin -5? - sin 23?)


Answer: B

Mathematics

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A. 0.853 B. 0.0853 C. 85.3 D. 853

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A. (5, 9, 3) B. (-5, 9, 10) C. (5, 3, 9) D. No solution

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