Multiple Choice
Use a product-to-sum identity to rewrite the expression.
-sin 19° sin 31°
A) 0.5(cos (12°) + cos(50°) )
B) 0.5(sin (12°) + sin(50°) )
C) 0.5(sin(50°) - sin (12°) )
D) 0.5(cos (12°) - cos(50°) )
Correct Answer:
Verified
Correct Answer:
Verified
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