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直线y=根号3/3 x+根号2,与圆心为D的圆(x-根号3)^2+(y-1)^2=3交于A,B两点则
直线y=根号3/3 x+根号2,与圆心为D的圆(x-根号3)^2+(y-1)^2=3交于A,B两点则
发布时间:2021-02-18 15:16:03
直线y=根号3/3 x+根号2,与圆心为D的圆(x-根号3)^2+(y-1)^2=3交于A,B两点则AD和BD的
网友回答
求AD和BD的夹角?D(根号3,1)到直线的距离是 |根号2|/(2根号3/3)=根号6/2 夹角一半的余弦为(根号6/2)/根号3=根号2/2 为45度,所以夹角是90度.
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直线y=根号3/3+根号2,与圆心为D的圆(x-根号3)^2+(y-1)^2=3交于A,B两点则AD
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已知⊙O的半径r=10,圆心O到直线l的距离OD=6,在直线l上有A、B、C三点,AD=6,BD=8
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