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Oksi-84 [34.3K]
3 years ago
10

Write the product cos(2x)sin(5x) as a sum

Mathematics
1 answer:
ratelena [41]3 years ago
8 0
Come on now, check your book on the "product to sum" identities

\bf cos({{ \alpha}})sin({{ \beta}})=\cfrac{1}{2}[sin({{ \alpha}}+{{ \beta}})\quad -\quad sin({{ \alpha}}-{{ \beta}})]
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