双曲线c2椭圆c1的焦点为顶点,顶点为焦点,b是双曲线第一象限上任意一点
A F分别为椭圆的右顶点和左焦点 椭圆的e=(1/2)∧0.5
b=c
双曲线c2椭圆c1的焦点为顶点,顶点为焦点,B是双曲线第一象限上任意一点试问是否存在常数λ使得角BAF=λBFA恒成立,若存在,求λ的值
人气:446 ℃ 时间:2019-08-22 10:06:05
解答
设B(x1,y1)
A(x,0) F(-sqrt(2)/2x,0) (sqrt根号) 很容易得出
但我作B到x的垂线,就郁闷了,
tan(角BAF) = y1/(x-x1)
tan(角BFA) = y1/(x1+sqrt(2)/2x)
怎么也没发现两个角有正比关系啊
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