Lecture-02 Domain & Range of signal

[@tula__]

at 17:47 the multiplication should be (aa' - bb') + j(ab'+a'b) if i'm not wrong

[@AA-ps8xv]

why is the - sign there?

[@mandarbamane4268]

@@AA-ps8xv because j.j=-1

[@andriypopov4249]

Really difficult to make any comments :) I agree with everything he says

[@shashankkumar5163]

Sir, at 13:50 u said about converting to polar from Cartesian but if my complex number= -3+j4, then my r=sqrt(3^2+4^2), which is 5 so r=5 but now my theta=taninverse(-4/3) so theta would be between 0 to -pi/2....but then my x=r*cos(theta) which is +ve as cos of negative number is positive and my, y = r*sin(theta) which is a -ve number since sin of a negative number is also negative...but it is coming opposite the number i have taken originally

[@aasimsayyed5530]

-3+j4 lies in second quadrant of the complex plain so when calculating the phase (which should always be with respect to positive x axis) uses 180°-taninverse(4/3) that will give you the correct phase

[@pulkitsrivastava5985]

Please tell me, If i am preparing for gate by myself , so should i follow any coaching videos or nptel videos are enough. For good rank in Gate. Plz tell me

[@utkarshshukla231]

I've the same problem , Anyone HELP PLEASE

[@jeeruanilkumar4048]

@@utkarshshukla231 I am also having the same problem

[@izazahmed8212]

@@jeeruanilkumar4048 not enough follow sahab singh yadav.

[@4l1-ssmk99]

Bro tell me pls is these nptel videos are enough to crack gate exam... I'm an ECE student

[@nithyag2790]

@@4l1-ssmk99 you can go through the videos of mit courseware signals and systems by Alan openheim

[@hrishiphulsundar1043]

useful video but i am playing it on 1.25 seconds per second....

[@tanoojamishra511]

Thank YOU sir

[@karimkhan1312]

excellent excellent excellent

[@ngvmanh7749]

Amarjeet Singh ok, i know :v

[@ngvmanh7749]

yu