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Find 10 partial sums of the series. (Round your answers to five decimal places)?

I would like to find the first 10 partial sums of the series defined by the expression ( \sum_{n=1}^\infty \cos(8n) ). I have attempted to calculate these sums multiple times, but I struggle with the trigonometric aspects of the problem. Could someone please help me understand how to approach this? Additionally, I would appreciate it if the answers could be rounded to five decimal places. Thank you!

1 Answers

A
Anonymous

Jan 08, 2025

cos(8)

cos(8) + cos(16)

cos(8) + cos(16) + cos(24)

And so on

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