如图,在平面直角坐标系中,经过点
,点
,B,O,且点O为坐标原点,则
的值为
更新时间:2024-03-19 08:11:11
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【推荐1】如图,在平面直角坐标系中,O为坐标原点,点
点Q在x轴的负半轴上
分别以
为腰,点C为直角顶点在第一、第二象限作,等腰
、等腰
连接
交y轴于P点,则
的值为________ .
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【推荐2】如图,在平面直角坐标系
中,
为等边三角形,点
,点B,C在
轴上,
是
轴上一点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/10/d1ff11e0-ebae-415e-9f66-1b5ebd2c249b.jpg?resizew=125)
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6765251bdbb41270d214a958c598b72f.png)
__________
;
(2)点
从点
出发,先沿
轴到达点
,再沿
到达点
后停止运动,点
在
轴上运动的速度是它在直线
上运动的速度的2倍,若点
按上述要求到达点
所用时间最短,则点
的坐标为__________ .
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(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6765251bdbb41270d214a958c598b72f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83873a9d782f2588c5eedbfe73f9bc2f.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf702adb116c1e46569eb7050d029f49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf702adb116c1e46569eb7050d029f49.png)
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【推荐1】如图,矩形
中,
,矩形
的对角线
相交于点O,点E,F为
边上两个动点,且
,则
的最小值为_________ .
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【推荐2】如图,四边形
是矩形,其中点
和点
分别在
轴和
轴上,连接
,点
的坐标为
,
的平分线与
轴相交于点
,则
点的坐标为__________ .
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【推荐1】如图,⊙O的半径为3,四边形ACBD内接于⊙O,连接OB、OA,若
,则劣弧
的长为______ .
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【推荐2】如图,
的两直角边
,
分别在
轴和
轴上,且点
,
的坐标分别是
和
,点
是半圆
上任意一点,则点
,
的最大距离为___________ .
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【推荐1】已知等腰三角形的两边长为5和6,则该等腰三角形底角的余弦值为________ .
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【推荐2】如图,在
中,
为
边上的中线,将
沿
翻折到
的位置,若
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________________ .
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