在所有棱长都为2的正四棱锥
中,侧棱
与侧面
和底面
所成的角分别为
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14462b51a239b9047a545f5a3e6f9333.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14462b51a239b9047a545f5a3e6f9333.png)
23-24高二上·吉林松原·期中 查看更多[3]
吉林省松原市前郭尔罗斯蒙古族自治县第五高级中学2023-2024学年高二上学期期中数学试题(已下线)模块三 专题3 小题满分挑战练(3) 期末终极研习室(高二人教A版)(已下线)广东省佛山市第一中学2024届高三上学期第二次调研数学试题变式题11-16
更新时间:2023-11-07 22:39:07
|
相似题推荐
填空题-单空题
|
适中
(0.65)
【推荐1】在正四面体ABCD中,点E,F分别是AB,BC的中点,则下列命题正确的序号是______
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/e7eb57ba-2b5d-4d07-948b-9aeb27e4d855.png?resizew=198)
①异面直线AB与CD所成角为90°;
②直线AB与平面BCD所成角为60°;
③直线EF∥平面ACD
④平面AFD⊥平面BCD.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/e7eb57ba-2b5d-4d07-948b-9aeb27e4d855.png?resizew=198)
①异面直线AB与CD所成角为90°;
②直线AB与平面BCD所成角为60°;
③直线EF∥平面ACD
④平面AFD⊥平面BCD.
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,在正三棱柱
中,
,
,
是侧棱
的中点,则直线
与平面
所成角的余弦值为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adddf9d8a3b3ded0562843be3ff52eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08c596aff6331566a0149449183c2024.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93ecad355286188fd317939fa50f9555.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/ff67b153-43d0-4961-9b76-42340b1efaa3.png?resizew=124)
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】正方体
中,E,F分别是
的中点,则
与截面
所成角的正切值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46e5c00c83010a02925fcc58c576f69d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36f6aef541fd1cdeaa8409e8c21f6b8e.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】如图,在四棱锥
中,
平面
,底面
是矩形,
,
,
是
上的点,直线
与平面
所成的角是
,则
的长为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73e20837a66df1185d5fbed39060e8c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78e7c0d7e49c2025a68fd71fb6a661bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b37793a3a810e823e10c340986f55ddd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1e2fd1d179d6533a26734ea393eebc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
您最近一年使用:0次