如图,四棱锥中,底面ABCD为矩形,
底面ABCD,
,
,E、F分别为棱PD、PA的中点.
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7a407b262c22419f73396170ecdc849.png)
(2)求异面直线PB与AE所成的角.
23-24高三上·上海黄浦·开学考试 查看更多[4]
上海市敬业中学2024届高三上学期开学考试数学试题上海市徐汇中学2023-2024学年高三上学期期中考试数学试题(已下线)上海市徐汇中学2023-2024学年高三上学期期中考试数学试题变式题16-21(已下线)通关练03 用空间向量解决距离、夹角问题10考点精练(58题) - 【考点通关】2023-2024学年高二数学高频考点与解题策略(人教A版2019选择性必修第一册)
更新时间:2023-09-11 22:18:15
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解答题-证明题
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解题方法
【推荐1】如图,已知在正三棱柱
中,D为棱AC的中点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/10/a73dd070-1c06-4f79-be18-dc427dc0988d.png?resizew=168)
(1)求正三棱柱
的表面积;
(2)求证:直线
//平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92105835f8075cb75dff244e908370b5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/10/a73dd070-1c06-4f79-be18-dc427dc0988d.png?resizew=168)
(1)求正三棱柱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
(2)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73845d4d663b3de0b281611fe2c762fe.png)
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【推荐2】设点A是
所在平面外一点,点M,N分别是
和
的重心.求证:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7592c4f01c8e06c7ee90df5b9413a9f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
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名校
解题方法
【推荐1】如图,已知平行六面体
的底面
是菱形,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0be648f9805e63dbb0e32399920ae1f.png)
,设
,
,
.
(1)用
,
,
表示
并求出
的长度;
(2)求异面直线
与
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0be648f9805e63dbb0e32399920ae1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d85003dbe6b44289bde68766ae53a33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f778d4d557c4572e5c72de918921223d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9a6facc3f8956c8fea30f60455804f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22226e7f4eae1d4c37a74321b60f0870.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/25/711fdc42-9b78-4fd9-8e3f-07476c720612.png?resizew=166)
(1)用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73a0b19e69be46452425916a0fcb49c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a38dfb3f3d83fa111eb89009789e88b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a38dfb3f3d83fa111eb89009789e88b1.png)
(2)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
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【推荐2】在棱长为2的正方体
'中,M,N,O,P分别为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/16/62dcb967-b4fd-4425-a370-ca3ad103a5ae.png?resizew=167)
(1)求证:
平面
;
(2)求异面直线
与
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3da8c338342e38c9aa3f274c053fd5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cac1fe065a3619a5e8e4c5446822d0b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/16/62dcb967-b4fd-4425-a370-ca3ad103a5ae.png?resizew=167)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed393b966631da9e9da5eb1721df2b3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82db65854bf434ba6dc37e5f90cdab6f.png)
(2)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/143e346ac3950f60077291dda2be73c3.png)
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