isabellao528 isabellao528

11-04-2024
Mathematics

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Write sin(7x)sin(5x) as a sum using Product to Sum.
1) (1)/(2)[sin(2x)+sin(12x)]
2) (1)/(2)[cos(2x)+cos(12x)](1)/(2)[sin(2x)-sin(12x)]
3) (1)/(2)[cos(2x)-cos(12x)]

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