如图,在正四棱台
中,
,
,
,
为棱
,
的中点,棱
上存在一点
,使得
平面
.
;
(2)当正四棱台
的体积最大时,求
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/439cf259dd6137aa31bb99244a04ddfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6db57eca2a7cbd91bc57372592580a76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66fb71b75b63594ebeeeebd1963eed5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d560542b646924eaf577480ac73281b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeef9d70a40b75f5f5c7c1859b4b627.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5f276ad76c075f4be32ad326d223cf3.png)
(2)当正四棱台
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeef9d70a40b75f5f5c7c1859b4b627.png)
2023·河南·模拟预测 查看更多[6]
河南省创新发展联盟大联考2023届高三预测数学(理科)试题重庆市万州第二高级中学2023届高三下学期5月月考数学试题(已下线)第05讲 空间向量及其应用(练习)(已下线)重难点突破06 立体几何解答题最全归纳总结(九大题型)-1(已下线)专题6-3立体几何大题综合归类-2(已下线)FHgkyldyjsx12
更新时间:2023-06-06 23:33:34
|
相似题推荐
解答题-问答题
|
较难
(0.4)
【推荐1】如图,在棱长为1的正方体
中,
为棱
的中点,点
满足
,
,
.
(1)若
平面
,求
的值;
(2)当三棱锥
体积最大时,求点
位置,并求体积的最大值.
![](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/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ada638fe7318db9cb0928990462d2769.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d1751e5590f3b14c8fe452587809f7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b63bb5c166bdb1479f8bab54b892624.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/15/a2a8c06a-ce2c-4a5d-b81a-dbd68e3d8285.png?resizew=150)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c907070ac9807667d10027d8bce8b2fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13063f81336ee296604cba1136a56092.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febf7413b35cf2889fdb57a6b519087c.png)
(2)当三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9d1fa89baa7d99accb4d00ec59708f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
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解答题-问答题
|
较难
(0.4)
名校
【推荐2】如图所示,四棱锥
中,△
为正三角形,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/2022/1/11/2892076218064896/2923249386692608/STEM/f0ea3c3e6ba742ce8b31e6228523723b.png?resizew=211)
(1)求四棱锥
的体积;
(2)求
与面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5164a3cc47e266446d49127e2ef10c37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e2550fca125b1f9e31f65701e4d0637.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c34f4a1d4e690ccc0efb3e38d8261aeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/490f0c21a0bfecc1447d54803af0b119.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/379b96bd6556f8b3f1f6f331d24e8283.png)
![](https://img.xkw.com/dksih/QBM/2022/1/11/2892076218064896/2923249386692608/STEM/f0ea3c3e6ba742ce8b31e6228523723b.png?resizew=211)
(1)求四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5164a3cc47e266446d49127e2ef10c37.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
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解答题-证明题
|
较难
(0.4)
【推荐1】如图,四棱锥S-ABCD的底面是正方形,
平面
,
,
,点E是线段SD上的点,且
(
).
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/11/ff846a18-f8b4-4bb5-82d0-dcdfde57bf5a.png?resizew=133)
(1)求证:对任意的
,都有
;
(2)设二面角
的大小为
,直线BE与平面ACE所成角为
,当
时,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fb2e071d4e01107dcf7d95cbb86b415.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c76d296e1cf0e421b3969c70064f6fcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a88c44f558705de3bcefcfc0ece96b8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cbee60fd68646f609fbb8c145262992.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1eaf48f1ad368af0b0961322e50d74e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/11/ff846a18-f8b4-4bb5-82d0-dcdfde57bf5a.png?resizew=133)
(1)求证:对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1eaf48f1ad368af0b0961322e50d74e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589ddae20626f9aaac616d2a3b5d95bd.png)
(2)设二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbeab80976db9b4689b9446cda06196a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6581916f5a65edfea257c804efee007e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd65b1bc56a348617cf7827d799a235c.png)
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解答题-问答题
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较难
(0.4)
【推荐2】如图,在四棱锥A-BCDE中,底面BCDE为矩形,M为CD中点,连接BM,CE交于点F,G为△ABE的重心.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/22/7224da7a-1027-4b1e-aefd-665541e1234b.png?resizew=178)
(1)证明:
平面ABC
(2)已知平面ABC⊥BCDE,平面ACD⊥平面BCDE,BC=3,CD=6,当平面GCE与平面ADE所成锐二面角为60°时,求G到平面ADE的距离.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/22/7224da7a-1027-4b1e-aefd-665541e1234b.png?resizew=178)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf60ad9db3411f35704fa88d86bfef5a.png)
(2)已知平面ABC⊥BCDE,平面ACD⊥平面BCDE,BC=3,CD=6,当平面GCE与平面ADE所成锐二面角为60°时,求G到平面ADE的距离.
您最近一年使用:0次