Help to solve fourier

[Elyos]

I have task to solve this. On last image there is answer and need steps how to get there

 

[HallsofIvy]

I don't see how any one can help you if we can't see what you DO know, what you tried, and where you went wrong. And to see that we need to see what you have done on this problem yourself.

Do you know what a "generalized Fourier representation" IS? Do you know what makes a set of functions "orthogonal"?

 

[Elyos]

Sadly no. I'm way too far from math.

 

[Deleted member 4993]

Sadly no. I'm way too far from math.

Why would you want to solve this "assignment"? You can find/learn the answers to the questions like:

Do you know what a "generalized Fourier representation" IS?​

​

Do you know what makes a set of functions "orthogonal"?​

- by searching Google. Please start working with those - and come back to us for more explanations related to those papers/videos.

 

[Elyos]

Did some online research. I found for this function I don't need to calculate bn, only a0 and an. Am I going right way? After that step I get 4/8(2cos(n*pi/4) = cos (pi*n/4) and that is exactly what I had in the beginning.