대학교/공학수학
dxdy = rdrdtheta
무말랭이
2022. 6. 9. 12:59
dxdy = r*dr*d(theta)
https://math.stackexchange.com/questions/1656814/how-to-prove-dxdy-r-dr-d-theta
How to prove $dxdy = r dr d \theta$?
$x = r \cos \theta$, $y = r \sin \theta$ I got $dx = \cos \theta dr - r \sin \theta d \theta $ $ dy = \sin \theta dr + r \cos \theta d \theta$ How to get $dx dy = r dr d \theta$?? I saw the same
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