已知正四棱柱
的底面边长为
,高为
,则集合
中元素的个数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/879aed4368c7007b6bf1ede0b0543a63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08b8e94b8c79e9a98e90a027a31f990b.png)
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更新时间:2023-11-18 12:37:46
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【知识点】 空间向量的坐标运算
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适中
(0.65)
名校
解题方法
【推荐1】正方体
棱长为2,
是棱
的中点,
是四边形
内一点(包含边界),且
,当三棱锥
的体积最大时,
与平面
所成角的正弦值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7253ffd3fc633d861810ee2e872188b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e99a635f1bc7f5a47690eb8e1d556d55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d01355a3443f2620b5f793cb14a7a78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
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