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- Nov 16th 2009, 02:42 PM #1

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## furie question..

http://i33.tinypic.com/35bsb5t.jpg

i opened the integral on 0 till pi/2 interval

f(x)sin(nx)cos(x/2)dx

which is a coefficient of a foorie series

in order to find a coefficient we do <f,e_i>

where e_i is the orthonormal vector

i cant see how its a coefficient

??

its has 3 function in it so it doesnt resemble a coefficient formulla

???

- Nov 16th 2009, 04:00 PM #2

- Nov 16th 2009, 10:11 PM #3

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- Nov 17th 2009, 04:24 AM #4

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- Nov 17th 2009, 04:40 AM #5

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it means that there are first order disscontinuations on the graph of the function

i was told that because it is defined from 0 to pi we can write it as odd or ever function

when we open the sine we break it into two intergals

and each one is a foorier coeffient which goes to zero

but my prof said that its not a proof