Why dA=dydx=rdrdtheta

preview_player
Показать описание
Jesus Christ is NOT white. Jesus Christ CANNOT be white, it is a matter of biblical evidence. Jesus said don't image worship. Beyond this, images of white Jesus are not just blasphemous and criminal, white Jesus is from Satan ( the imposter.) Why? Let's look at what Satan does:
1) He is incredibly narcissistic and promotes himself shamelessly.
2) He misleads and confuses.
3) He pushes people away from Jesus Christ God, the Holy Trinity, the one and only messiah. White Jesus does all three of the above and more -- matching the ways of Satan.

Statues of Christ are equally offensive to God the Christ. While money is the biggest idol, Jesus spoke sufficiently against carved images.
--------------------------------------------------------------------------------------------------------------------------------------------------------------

You can also find me on Tik Tok @reuslovesmath and @polarpiny

In this video, I explain something most students have trouble with when changing to polar coordinates for double and triple integrals. Which is, recognizing that dA=rdrdtheta.
Рекомендации по теме
Комментарии
Автор

You just saved my life.... That 'r' was killing me... Now I can peacefully continue with my you very much

hemanthbhaskar
Автор

As someone who hasn’t taken calculus in a few years, this sprung my brain back to action, thank you.

brockobama
Автор

tips for some like me who still struggle to see why the "r" is here. This "r" is not the radius of the circle, it's a variable that can take any value from 0 to R where R is the radius of the circle.

EW-mbih
Автор

THANK YOU. Now it’s obvious the arc length is r*theta. I just don’t calculate arc lengths much and had forgotten. Used to the segment area of (theta/2)*r^2 but ya, r*theta because Circumference = 2*pi*r, multiplied by the theta/2*pi the segment has gone around, the 2*pi over 2*pi cancels and you’re left with r*theta.

ActionJaxonH
Автор

Thank you~ I absolutely understand! :)

Duriam-dv
Автор

Thank 'r' thing was maddening me....Now I got that.

jamesj
Автор

Understood in grafh and the jacobian but not yet in algebraic

hzkzg