Extremely useful. Thank you very much for posting this.
i fucking love you, thanks so much
This video had 69 likes when I got here but it was so helpful I had to make it 70
please sir can you answer me what if we have in the vector x=u sinv , do we still do z^2=u^2cos^2v+u^sin^2v?
--we have z^2=x^2+y^2 given
Honestly this videos are the only thing helping me pass my calc class, keep up the work brotha!