来自刘皓明的问题
【有椭圆焦点弦长计算公式吗?不是弦长公式啊比如知道椭圆方程焦点弦斜率有公式可以不联立方程就求弦长吗像抛物线2p/sin^2θ】
有椭圆焦点弦长计算公式吗?
不是弦长公式啊
比如知道椭圆方程焦点弦斜率有公式可以不联立方程就求弦长吗
像抛物线2p/sin^2θ
1回答
2020-02-19 10:42
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万胜美
a+ex
a-ex
x为横坐标
焦点弦长最简方法就是联立,俺无能为力
2020-02-19 10:44:07
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