Multiple Choice
Use a sum-to-product identity to rewrite the expression.
-cos 8s - cos 5s
A) 2 cos(6.5s) cos(1.5s)
B) 2 sin(6.5s) cos(1.5s)
C) -2 cos(6.5s) sin(1.5s)
D) -2 sin(6.5s) sin(1.5s)
Correct Answer:
Verified
Correct Answer:
Verified
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