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Mathematics, 05.07.2019 08:10 webbjalia04

Express cos5mcos(-3m) as a sum or difference.
-1/2cos2m + 1/2cos2m
1/2cos2m - 1/2cos8m
1/2cos8m - 1/2cos2m
1/2cos8m + 1/2cos2m

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Express cos5mcos(-3m) as a sum or difference.
-1/2cos2m + 1/2cos2m
1/2cos2m - 1/2cos8m
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