ellipse--parametric equation
點解要選x=acos(alpha)
y=bsin(alpha)
在座標上有什麼意思?
為何不用x=asin(alpha)
y=bcos(alpha)
ellipse--parametric equation
2010-10-28 6:20 am
回答 (1)
2010-10-28 9:27 am
✔ 最佳答案
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2010-10-28 01:30:23 補充：
The last sentence should be :
However, it is a common practice that the rotating axis moves anti-clockwise from the positive x-axis direction.
Thts is why we have
x=a cos α
y=b sin α
收錄日期: 2021-04-23 23:09:07
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20101027000051KK01362