I would like to thank you so much you really saved my life . however i have final exam and i don't understand rotating but now i understood you when you explain >> thank you again and best luck

please explain how to graph the surface of revolution, ty

Very good explanation.

very insightful sir. Thank you. By any chance are you the same person for the KZfaq channel "lasseviren1" if not you guys have the same voice. If yes you are a master of physics and math and i owe you my good grades.

This really helped.

Thanks so much!

thanks! :)

thank you !!!

thanku sir ...pls explain,surface patch .

domo arig