- #1

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- 316

- Homework Statement
- Kindly see attached (just need clarification on highlighted part).

- Relevant Equations
- Fourier cosine series

My question is; is showing the highlighted step necessary? given the fact that ##\sin (nπ)=0##? My question is in general i.e when solving such questions do i have to bother with showing the highlighted part...

secondly,

Can i have ##f(x)## in place of ##x^2##? Generally, on problems to do with Fourier series- what is usually indicated is ##f(x)##... or it does not matter? yes, i know that ##f(x)=x^2##. My question is in reference to the general widely used notation on such problems.

Cheers.