Mathematics, 27.07.2019 11:20 naomicervero

The expression cos4xcos3x+sin4xsin3x is equivalent to? a. sin x b. sin7x c. cos x d. cos7x

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The expression cos4xcos3x+sin4xsin3x is equivalent to? a. sin x b. sin7x c. cos x d. cos7x...

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