CoreUI Logo CoreUI Logo
Question
新问题 返回

问题

几何 >> 微分几何 >> 曲线曲面论
Questions in category: 曲线曲面论 (Curve and surface theory).

求下列曲线的曲率和挠率.

Posted by haifeng on 2012-06-30 09:46:40 last update 2012-07-26 09:21:48 | Answers (2) | 收藏

  1. r→=et(sin⁡t,cos⁡t,1),
  2. r→=a(cosh⁡t,sinh⁡t,t).