如图,正三棱柱
中,各棱长均等于
,
为线段
上的动点,则平面
与平面
所成的锐二面角余弦值的最大值为______________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46b91c857bbe3c4f0f08dd2a4124a96e.png)
![](https://img.xkw.com/dksih/QBM/2020/2/15/2399576145403904/2425602133204992/STEM/02a077eeb9174e75866b86b955353f8a.png?resizew=182)
19-20高二上·浙江绍兴·期末 查看更多[5]
浙江省绍兴市诸暨市2019-2020学年高二上学期期末数学试题(已下线)1.4.3+运用立体几何中的向量方法解决距离与角度问题(重点练)-2020-2021学年高二数学十分钟同步课堂专练(人教A版选择性必修第一册)(已下线)3.4.3 运用立体几何中的向量方法解决距离与角度问题(重点练)-2020-2021学年高二数学(理)十分钟同步课堂专练(人教A版选修2-1)福建省福州华侨中学2022届高三上学期期中考数学试题(已下线)FHsx1225yl162
更新时间:2020-03-23 10:03:05
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【知识点】 面面角的向量求法
相似题推荐
填空题-单空题
|
适中
(0.65)
解题方法
【推荐1】如图所示,在正方体
中,点
是棱
上的动点(
点可以运动到端点
和
),设在运动过程中,平面
与平面
所成的最小角为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38dd8aad9cfb5e1fe2a45d80923f1571.png)
_____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bf024a4b21f8c22e89777bc130cc62a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ebb05874eb3353d754af24c9974273e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38dd8aad9cfb5e1fe2a45d80923f1571.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/25/6857d31b-3e75-47af-8778-26040caecd2d.png?resizew=151)
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】如图,在四棱锥
中,底面
中
,
,侧面
平面
,且
,点
在棱
上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/13/6ef0b258-cf06-4e3a-9b69-bc1073adfc58.png?resizew=163)
则二面角
的余弦值为____________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80c753cb1eb73fd8d136d00462970797.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3402ea855e2ae2dcd98f607bef4fdd6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed5f0cfc1049f84a04c81bd213afb8d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4770a1f98495ff85859bc6508d6d5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76b54647a7c34d1046c8d6c198d3654d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/13/6ef0b258-cf06-4e3a-9b69-bc1073adfc58.png?resizew=163)
则二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/135a12aa48eb33bf5116662e0f9f0799.png)
您最近一年使用:0次