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解题方法
1 . 由二维平面向量可以类比得到三维空间向量一些公式,比如若
,
则
,
等.非零向量
,若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23ab55ce496dc3dfdf3f0c459ccf49cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f39c662a3927de39135c3eee4b9cb68f.png)
.若
,
,则与
、
向量垂直的单位向量的坐标是(写出一个即可)___________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a307b12e769bfe3794cf384acb5158.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4399696c04b39a19df36fbbfeb40857a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3df747d55394252a5d77e2bc0d843abc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ee42162824141eda41d37e3c053e39b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/116e2e7116a7b5cd0a912ec0699ca017.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23ab55ce496dc3dfdf3f0c459ccf49cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f39c662a3927de39135c3eee4b9cb68f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c39d1d88189726ae99c309644fca3494.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fbb6bff810cd8f8694592d32936e0dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1b53dacec127f88f88afed63959259e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ae98586d80f892771c90ab39eaced90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee437e6ff470c2f67b8429f57b90ae37.png)
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2024-03-23更新
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114次组卷
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2卷引用:重庆市黔江中学校2023-2024学年高一下学期3月月考数学试题
2 . 重庆市黔江区濯水风雨廊桥有“世界第一廊桥”之称。风雨廊桥横跨于阿蓬江上,桥身为纯木制结构,建筑材料之间以榫头卯眼互相穿插衔接,结构牢固精密,分为桥、塔、亭三部分,现从江上某处目测桥身部分类似圆弧状(如下图),已知圆弧所对圆心角为2,所在圆半径为2,求得桥身与江面围成(弓形)的面积约为________ (结果用三角函数表达).
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/11/e49981e9-91be-447f-bba7-7fccee1491e9.png?resizew=290)
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