Hi, this question is being a pain to me can someone please help.

a) Find the Fourier cosine series of for interval .

b) Use it to find the sum

Thanks

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- Oct 14th 2011, 04:27 AMkittycat485fourier cosine series
Hi, this question is being a pain to me can someone please help.

a) Find the Fourier cosine series of for interval .

b) Use it to find the sum

Thanks - Oct 14th 2011, 05:16 AMDeMathRe: fourier cosine series
Use the standard formulas:

http://www.forkosh.dreamhost.com/mat...\end{aligned}} - Oct 15th 2011, 04:01 AMkittycat485Re: fourier cosine series
wow, thanks demath, I was just thrown a bit by the absolute sign. I understand it now.