解题方法
1 . 已知
的三个顶点的坐标分别为
.
求![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bf6c84731e5e1bd335ecfc2d36c3d81.png)
边上中线的长;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f53190d6ead827a6338b9de847aeaf1.png)
边上中线所在的直线方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d1fde044f833dcc6b3fb83ac89c0f99.png)
求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bf6c84731e5e1bd335ecfc2d36c3d81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f53190d6ead827a6338b9de847aeaf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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解题方法
2 . 若直线
始终平分圆
的周长,则
的最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82c51b70422bad17fe09729f86fd967c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3063ea830299d71f39433447e0e24463.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b57f879f6e8df7d5fb261328806260b3.png)
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3 . 若直线
与曲线
恰有一个公共点,则实数
的取值范围是_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07565f10847840e0fb07b05218ad17fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7776f8179bc04afd0574c9019945e922.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
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2020-02-29更新
|
283次组卷
|
3卷引用:上海市浦东新区2015-2016学年高二下学期4月教学质量检测(期中)数学试题
4 . 直线
与直线
的夹角是_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51a003a5de6ad7e02bbb63059b5fa818.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e37da4e7115560e375fd547d01baf16.png)
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5 . 直线
的方程为
,则直线
的倾斜角为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e8a3365e99f926b1dafa901ab232152.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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解题方法
6 . 以
为圆心,且经过原点的圆的方程是_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5265d99095b635f62c7915298ec0e963.png)
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解题方法
7 . 如图,在四棱锥
中,底面是边长为2的正方形,
⊥底面
,
为
的中点,
与平面
所成的角为
.
![](https://img.xkw.com/dksih/QBM/2020/2/28/2408951150436352/2409506465693696/STEM/c71c0d67c55844e3b9a25ea5bfbe50b7.png?resizew=220)
(1)求证:
;
(2)求异面直线
与
所成的角的大小(结果用反三角函数表示);
(3)若直线
、
与平面
所成角分别为
,求
的值.
![](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/411b38a18046fea8e9fab1f9f9b80a5f.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/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/717d026dd0029aab76fd410d88f67bd8.png)
![](https://img.xkw.com/dksih/QBM/2020/2/28/2408951150436352/2409506465693696/STEM/c71c0d67c55844e3b9a25ea5bfbe50b7.png?resizew=220)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/746f70c9993f04a5037c53daf3d1af00.png)
(2)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
(3)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e288596fa3811dd2c17bded60e82e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdd64aaccd976873d5c241352be7e09a.png)
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8 . 如图,设计一个正四棱锥形冷水塔,高是3米,底面的边长是8米:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/08221a91-04cb-42c2-b15c-d080b43484e4.png?resizew=225)
(1)求这个正四棱锥形冷水塔的容积(冷水塔的厚度忽略不计);
(2)制造这个冷水塔的侧面需要多少平方米的钢板?
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/08221a91-04cb-42c2-b15c-d080b43484e4.png?resizew=225)
(1)求这个正四棱锥形冷水塔的容积(冷水塔的厚度忽略不计);
(2)制造这个冷水塔的侧面需要多少平方米的钢板?
您最近一年使用:0次
2020-02-29更新
|
154次组卷
|
3卷引用:上海市闵行区2015-2016学年高二下学期期末数学试题
9 . 如图,正方体
,则下列四个命题:
①点
在直线
上运动,三棱锥
的体积不变
②点
在直线
上运动,直线
与平面
所成角的大小不变
③点
在直线
上运动,二面角
的大小不变
④点
是平面
上到点
和
距离相等的动点,则
的轨迹是过点
的直线.
其中的真命题是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/7c232bc2-158b-4b50-9d70-0edbbbe7671b.png?resizew=169)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
①点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ad99ef5e70de37345c708b758d545f.png)
②点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da7977ab975efa6411cc17de39be70d9.png)
③点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67094912ebf6dd7b27b835af55df4826.png)
④点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
其中的真命题是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/7c232bc2-158b-4b50-9d70-0edbbbe7671b.png?resizew=169)
A.①③ | B.①③④ | C.①②④ | D.③④ |
您最近一年使用:0次