Hi,

Can someone please explain to me what is happening from step A to step B in the attached diagram of a Full-Wave rectified Waveform ??

Ok, he's applying the limits, but from where did the "-1"s came?

Also, in step C, why are they equal to 1 ?

Any help would be apreciated

Reference link: http://www.transtutors.com/homework-help/networks-systems/fourier-series/full-rectified-wave.aspx

 

From A to B is just the simplification of taking the limits of integration, in the case, from 0 to pi.


To help you understand part C, fill in a table of what cos(2*n*pi - pi) will give you for different values of n...

 

Hi, thanks for the reply.

Ok I did the table and noticed that whatever the value of n is, the answer will still remain -1.

Regarding step B, I still cannot understand from where the "-1"s and the minus in front came from...

 

Hi again,

Attached is a photo showing how I worked step B. Is it correct please? since I end up not using -1 (which I don't know from where it came from)