Finding Fourier coefficients for square wave

Finding Fourier coefficients for square wave

[Integrelle]

Im in 3rd year electrical engineering and my class has been shafted by a brand new prof who got his PhD last year, and speaks VERY broken english. Lectures are hopeless, but this series is actually helping a lot!
Thanks Sal

[danielbrantley]

Thank you for this video. We just started our Fourier series and transforms chapter in Math 346 and our hw was a single problem! Thank you for showing a clear example!

[vwcanter]

The expression for a-nought is derived in the preceding video. But the expressions for a-sub-n are not derived, just presented as a formula.

[davefrost]

2nd year mech eng here who has a final exam tomorrow.. wish the lecturer showed us this instead of his slides

[DANCEVIC]

Love your videos, thanks for all the detailed explanation. Great job

[ammelodiana]

everything has just clicked. thanks so much

[joshuasusanto]

Ahhh yesss.... It's all coming together now

[capoman]

8:40 Couldn't you use (-1)^n to represent the even odd nature of cos(npi)?

[Liamv]

using the 2pi period to simplify this has actually made it harder to understand.. because i have no idea how to setup the equation for other periods. idk where the periods go.. or where there are supposed to be pi's. Eg my current assignment has a 15V pk-pk, 8000Hz, 50% duty cycle square wave. And I have to calculate the first 3 non zero fourier coefficients. No idea.

[klipk]

3:49
Was finally starting to understand until he started getting all fancy here

[tsehayenegash]

I have 15 years temperature data. I want to remove seasonality variation from the time series data, so how can I get the constan term ao, the amplitude and the phase change by using these given temperature data? thank you

[sella-san]

why did you use 1/Π on bn and an instead of 1/2Π as used in a0? I'm sorry, this part confused me. 😕

[samafaris]

I have a problem getting how when n is even you get zero. When n=2, cos 2 (Pi) is not 1, it is -1 so it doesnt add up to zero! Please explain?
Thanks

[jojofatjojojojojo]

not bad. needed help with this. thanks salmon

[antonfelix]

can (an) and/or (bn) be negative to allow any degree of phase shift? (For another waveform)

[anuarakhynov]

when calculating b you took its integral from 0 to pi whereas your period at the beginning of the problem was 2pi.

[nevermindshort]

I don't understand how the n just disapears when you integrate at 6:16

[TamPham-phdz]

Is this function odd, even or neither?

[hamsandwichlover]

If im successful in life im donating all my money to khan academy 😭

[karanarora]

"We definitely need a drum roll" - Sal