解题方法
1 . 在透明的密闭正三棱柱容器
内灌进一些水,已知
.如图,当竖直放置时,水面与地面距离为3.固定容器底面一边AC于地面上,再将容器按如图方向倾斜,至侧面
与地面重合的过程中,设水面所在平面为α,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f41d364b55d88688cd1f571ed231228.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
A.水面形状的变化:三角形⇒梯形⇒矩形 |
B.当![]() ![]() |
C.当![]() ![]() |
D.当侧面![]() |
您最近一年使用:0次
2024-03-14更新
|
932次组卷
|
4卷引用:云南省大理白族自治州祥云县祥云祥华中学2023-2024学年高一下学期4月二调数学试题
云南省大理白族自治州祥云县祥云祥华中学2023-2024学年高一下学期4月二调数学试题河北省唐山市2024届高三下学期第一次模拟演练数学试题(已下线)压轴题04立体几何压轴题10题型汇总-1(已下线)专题06 空间角、距离的计算-期末考点大串讲(苏教版(2019))
名校
解题方法
2 . 已知在△ABC中,A,B是两定点,
,△ABC面积不超过
.当
时,BC=4.
(1)求角A的取值范围;
(2)对任意
,关于x的不等式
在
时恒成立,求函数
的值域.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18617ef38a8df95ff3d66fa811fd56c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47ed6edce3ea136a40855affc404ea17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33c99fc553ecb3e2afdb7058201bc642.png)
(1)求角A的取值范围;
(2)对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/620170c5878252151a173382441947d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec82993cd8b578a630ab0d8bf3ac02eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3df34e1f26749ef7fcb226bed1bc91c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84a06837f6cda3f3bb845cc94a85ed2d.png)
您最近一年使用:0次
2022-07-02更新
|
477次组卷
|
2卷引用:云南省昆明市第十二中学2023届高三(普通班)下学期2月月考数学试题
名校
3 . 如图,某城市公园内有一矩形空地
,
,现规划在边
上分别取点E,F,G,且满足
,在
内建造喷泉瀑布,在
内种植花卉,其余区域铺设草坪,并搭建栈道
作为观光路线(不考虑宽度),则当![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cdb52ea78c82889198c3c30b53d74d.png)
_______ 时,四边形
的面积S最小,此时![](https://staticzujuan.xkw.com/quesimg/Upload/formula/447a9718a502491b47072ce013c26a2f.png)
______
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52cc9a7c51d397cbeddaadb28d1054c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f169a7ad9db88242ce76ca4000606d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80b5def3aed01669e1f695fc8562ff57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f4373ab5214b0ef51c14c08f70b377a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36e5e61804ce550636a0354e0a78a22d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cdb52ea78c82889198c3c30b53d74d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8d0e8404f347a0eb4c76f4d25d9bdac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/447a9718a502491b47072ce013c26a2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba007666deb89951641bd1e24bc174a2.png)
![](https://img.xkw.com/dksih/QBM/2022/2/22/2921731087040512/2938236482584576/STEM/2f86272c39ab460d8c984a66c4a6753c.png?resizew=158)
您最近一年使用:0次