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

from n=1 to infinity cos 8nI have tried to do it so many times, but I couldnt figure out how to do it because of the trigonometric thing. help please!!!!!!!!

1 Answers

cos(8)cos(8) + cos(16)cos(8) + cos(16) + cos(24)And so on... Show More

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