解题方法
1 . 如图所示,在四棱锥
中,
为等腰直角三角形,且
,四边形ABCD为直角梯形,满足
,
(1)求证
;
(2)若点E为PB的中点,点F为CD的中点,点M为棱AB上一点.当
时,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c025ee3317be1099b7bf03a11e37ed4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa3f47f7c8e18b5e501c9bddeda0a547.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/541c76819d18030fa02fcdea0696486f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/15/78fae179-666c-4651-b255-6fa92c4eb091.png?resizew=145)
(1)求证
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c71dbf267939080668be464f1aa60da.png)
(2)若点E为PB的中点,点F为CD的中点,点M为棱AB上一点.当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96a2d4b21832458c74b98c2f3428d509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d036bb00a4dbe069c98fa8604559c1dd.png)
您最近一年使用:0次
解题方法
2 . 在四棱锥
中,底面ABCD是边长为2的菱形,
交
于O,
,
,
.
(1)求P到平面
的距离;
(2)求钝二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea4f5eec0addba78f2e0cdfb7ecc59a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd3eedeededdc7c9eb023aec9a101981.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb7383ab3dc2ae9dce9b6ff0f8c4fb26.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/12/d083672e-6689-41c5-b467-9f21a3a6dd05.png?resizew=160)
(1)求P到平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)求钝二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b33b7213d99a817bff19bcf740a0697c.png)
您最近一年使用:0次
名校
3 . 如图,在平行四边形
中,
,四边形
为正方形,且平面
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/21/894dab70-62b6-4329-86ae-709f7d0af0ba.png?resizew=160)
(1)证明:
;
(2)求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68d524a7f82604044f8a27174c8e95e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd4b93d7abcfc4c3df48f03aa969c17f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cf9a6db3571fa57bfa2d5e4d44c51b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd4b93d7abcfc4c3df48f03aa969c17f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/21/894dab70-62b6-4329-86ae-709f7d0af0ba.png?resizew=160)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9f76925ed99b7172956319974258a9b.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fa3254460ecbacecb3e57c5dce227f4.png)
您最近一年使用:0次
名校
解题方法
4 . 已知直三棱柱
,
,
,D,E分别为线段
,
上的点,
.
平面
;
(2)若点
到平面
的距离为
,求直线
与平面
所成的角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c31c01eeb92862fe1ed7f680e0525f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/037b342a682cbd4241855a243da3c016.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/037292e0eb086103d3a1cdebb881544d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec1dd605d4b465912da694f260f5aae7.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec1dd605d4b465912da694f260f5aae7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa5a1a2ee471c67aa5264c0991d05421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec1dd605d4b465912da694f260f5aae7.png)
您最近一年使用:0次
2024-03-07更新
|
421次组卷
|
3卷引用:浙江省杭州市2023-2024学年高三上学期期末数学试题
名校
5 . 如图,在多面体
中,四边形
是边长为
的正方形,
,
,
,平面
平面
.
;
(2)求平面
与平面
所成锐角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bb5f97d47fbb49fcfcdc7f5e882a80b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6f09078cfef11def13fdeb6ba2b42cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2547fdf1f1100a4b1dcc94704449f2b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10eca594d6a0e6f8b7d9c2b62f9e588f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a31a8e1321c1f5c9bc28c9164995187.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ae8768996ca9a0f2c5d9a19abbd54df.png)
您最近一年使用:0次
2024-03-07更新
|
533次组卷
|
4卷引用:浙江省临平萧山联考2023-2024学年高二上学期期末数学试题
23-24高三上·浙江绍兴·期末
解题方法
6 . 如图,三棱柱
是所有棱长均为2的直三棱柱,
分别为棱
和棱
的中点.
面
;
(2)求二面角
的余弦值大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3a51949f48ee8cf746851ba779b078e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f96e23f7b5d3b1dcac47c19fd6da8860.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03cdf382d6962a5fee6064dcae93e37f.png)
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7 . 如图,在四棱锥
中,
,
,
,
,
,
,点
为
的中点.
(1)证明:
平面
;
(2)当直线
与平面
所成角为
时,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cc1bc8449eeafb19ddde59d8f3c77db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b25412aade92bdf99a3dc104bd0e356e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f397e61359ce5470234d6b4938126f1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6ec382b9d66e43e7fa8f75eccb0d3bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6060d9a82ed5405a1ea8cd824448b6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b515965c22d2950b592c096c6e3bdfd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866c22ed884b41b50235b50b25c6ed0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/5/43eec34e-72bc-46a6-8085-ea36ce93b637.png?resizew=162)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4862958e60c245dc9a5d9cb57d31eb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/520f8abda6a85e7ef6f281fc2df853fa.png)
(2)当直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d7ea65be0351e839d45d598dfb254b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b33b7213d99a817bff19bcf740a0697c.png)
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8 . 如图,四棱锥
的底平面是边长为2的菱形,
,
,
,
为
的中点.
(1)证明:
平面
;
(2)若
,求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f945a69cf7e8213e50622125cde652f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/036de574712cad14bddadf6653c7e714.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32d0710321d97361e5782124bbf7f0c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/5/5c728d21-c128-4b59-a86d-4c0df2616368.png?resizew=167)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f1897a7e856b42f8cee0f286ad913d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/926584088b939200d88e64318f2d4e6c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/545e18836bc7fee22f8f813a6f525d93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/926584088b939200d88e64318f2d4e6c.png)
您最近一年使用:0次
名校
9 . 如图,在四棱锥
中,四边形ABCD为平行四边形,
,在等腰直角
中,
,M为PD的中点,
.
平面BCP;
(2)求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e87af82cf14c44a89b589edd29ba3ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/983add910c8e09954f164a5e87d1f7fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f4002cada49bee853d7f1ddd49c9fca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9f38865b4f99742f2d04ac635b9fe2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280247d7df395bb9ea78c51e67b458d2.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/feb7851bac6e137a2aabd6484076e4ae.png)
您最近一年使用:0次
解题方法
10 . 如图,在四棱锥
中,四边形
是平行四边形,
平面
,
为
中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/5/5de731a0-8dc3-4946-bffc-9f5d02dfa874.png?resizew=157)
(1)求平面
与平面
夹角的余弦值;
(2)设点N在直线
上,若
的面积是
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64a28a3c67928bdc36505ce6cd3907c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b8e70aed4d5ad04f18119145d4c965c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/5/5de731a0-8dc3-4946-bffc-9f5d02dfa874.png?resizew=157)
(1)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fcce61c3d158b5331d6de10db3fb55d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf4c26f3f4d96117f087400a0f32ece8.png)
(2)设点N在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35fe4d4160c1b1c9bdb52cf72b451b0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4306d83186018024f1e40ea9a90af3cb.png)
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