椭圆等分

https://wenku.baidu.com/view/49828d28647d27284b73510f.html

idocdown-v3.2.8 文档下载

https://c-t.work/s/f3c7442b6eae4b

// 椭圆圆周公式

https://blog.csdn.net/chenlu5201314/article/details/100023943 

椭圆一般方程求解椭圆标准方程参数

https://blog.csdn.net/easecode/article/details/22610761

斜椭圆一般方程与标准方程参数间的关系

https://wenku.baidu.com/view/210f671de87101f69e319560.html

https://wenku.baidu.com/view/f0b25c5776c66137ee06199c.html

https://blog.csdn.net/hjq376247328/article/details/89488509

椭圆的画法

https://blog.csdn.net/orbit/article/details/7496008

http://mathworld.wolfram.com/Ellipse.html

根据”圆心角“求斜椭圆坐标

https://blog.csdn.net/he_zhidan/article/details/81347426

https://wenku.baidu.com/view/2c7c0d360b4c2e3f57276361.html

http://mathworld.wolfram.com/Ellipse.html

https://baike.baidu.com/item/%E6%A4%AD%E5%9C%86%E6%97%8B%E8%BD%AC/18876884?fr=aladdin