given x = r * cos, y = r * sin,
can you show that dx * dy = r * dr * d ?
a question on differential
2009-12-03 4:52 am
回答 (2)
2009-12-03 5:21 am
✔ 最佳答案
x=rcosθ,y=rsinθdx=cosθdr-rsinθdθ
dy=sinθdr+rcosθdθ
dxdy=
|cosθ -rsinθ| * drdθ
|sinθ rcosθ|
=rdrdθ
2009-12-03 5:23 am
Jacobian
收錄日期: 2021-04-19 20:48:57
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20091202000051KK03274