Use a product-to-sum identity to rewrite the expression.cos 2° cos 24°
A. 0.5(cos(-22°) - cos(26°))
B. 0.5(sin(26°) + sin(-22°))
C. 0.5(cos(26°) + cos(-22°))
D. 0.5(sin(26°) - sin(-22°))
Answer: C
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