I don't know how to find out the taylor series of exp(x)*cos(x)

I think I should write the taylor series for exp(x) and cos(x) separately and the multiply them, but I don't know how to multiply these two sums

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- Jun 11th 2017, 07:20 AM #1

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- Jun 11th 2017, 09:02 AM #2

- Jun 11th 2017, 09:19 AM #3

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