题型:填空题-单空题
难度:0.65
引用次数:306
题号:22812586
设
为单位向量,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/338189ec20d1ec7fdbbc189d209428dd.png)
___________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b172cf8d898883d82e973f28c3c3a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d51c62833bf755f6d77083f26444a88d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/338189ec20d1ec7fdbbc189d209428dd.png)
更新时间:2024-05-15 05:39:54
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适中
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解题方法
【推荐1】如图,在扇形
中,
,半径
,P为弧
上异于A、B的一动点,则
的取值范围是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a77343ecde1c2665df291761b6563.png)
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填空题-单空题
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适中
(0.65)
名校
【推荐2】窗的运用是中式园林设计的重要组成部分,在表现方式上常常运用象征、隐喻、借景等手法,将民族文化与哲理融入其中,营造出广阔的审美意境.从窗的外形看,常见的有圆形、菱形、正六边形、正八边形等.已知圆
是某窗的平面图,
为圆心,点
在圆
的圆周上,点
是圆
内部一点,若
,且
,则
的最小值是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72f0ad6a2ccbb2c87e690b6acb7c518e.png)
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您最近一年使用:0次
填空题-单空题
|
适中
(0.65)
解题方法
【推荐1】若向量
与
的夹角为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fc6092100600070328042adaf76aad3.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/838e6663524bf7d6eac04991739ea2b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fc6092100600070328042adaf76aad3.png)
您最近一年使用:0次
填空题-单空题
|
适中
(0.65)
解题方法
【推荐2】已知向量
,
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/102bfda2b5aea3dfe44b8efd474f6b59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baf69b5f85d52b6aca489c6016c32a1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/480e7839b807ca5c0c6c4028eba6c00c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
您最近一年使用:0次
填空题-单空题
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适中
(0.65)
名校
解题方法
【推荐3】我们把由平面内夹角成
的两条数轴
,
构成的坐标系,称为“@未来坐标系”,如图所示,
分别为
正方向上的单位向量,若向量
,则把实数对
叫做向量
的“@未来坐标”,记
,已知
,
分别为向量
,
的“@未来坐标”,若向量
,
的“@未来坐标”分别为
,
,则向量
,
的夹角的余弦值为______ .
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10814bc3db929e79874befe96cf4e3d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46c092d69df76faf1e2133dc96b466ef.png)
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您最近一年使用:0次