在
中,角
对应的边分别为
,已知
,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5f1e5d29de6e4d72bfed62d9c14dde5.png)
______ ,
的面积为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d12de0fe32eedb8fab4fd3a50dfa7a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f2bc8adc993cad5553d66285b5971f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5f1e5d29de6e4d72bfed62d9c14dde5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
更新时间:2024-06-17 20:25:40
|
相似题推荐
填空题-单空题
|
较难
(0.4)
解题方法
【推荐1】在
中,角
,
,
所对的边分别边
,且
,设角
的角平分线交
于点
,则
的值最小时,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e07943aba85bf1d3275e5c91dbb28620.png)
___ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb90cc59c2128b85201dffe42cab8121.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6402f1010e94be78552ed4c45548b1b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e07943aba85bf1d3275e5c91dbb28620.png)
您最近一年使用:0次
填空题-单空题
|
较难
(0.4)
【推荐2】已知
是锐角
的外接圆的圆心,且
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
_____________ .(用
表示)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5251a0264e9921b1bbd19798d4cb446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cee1cf625d78bef2f80ef4a38f8d9d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
您最近一年使用:0次
填空题-单空题
|
较难
(0.4)
名校
【推荐2】在斜边长为4的等腰直角三角形
中,点
在斜边
(不含端点)上运动,将
沿线段
折到
位置,则三棱锥
体积的最大值是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db5e1441a49e782ff0ef46e776cde06a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49e2a5a8708c06d509c766863a4d6279.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08a9ec3b527947cad9caa4537e0cb7e7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/22/35ca5441-f6d3-495a-8f60-7bc87b65d556.png?resizew=214)
您最近一年使用:0次
填空题-单空题
|
较难
(0.4)
名校
【推荐3】给出下列五个命题,其中正确的命题是______ .
①点
是函数
的一个对称中心;
②若满足
,
的△ABC恰有两个,则k的取值范围是
;
③设A、B、
且
,
,则
等于
;
④已知点P为ABC内一点,
,则△APB,△APC,△BPC的面积之比为3:2:1.
①点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/656d567ad105c13e222bc2d4c92f9be3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89b39952f7eae7b5b2593f141c2e1fc9.png)
②若满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c47e66258d3c21dd9bf44dab2c960afc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42f403b648a80ecf65f58ecbaf180c6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bd46f51f052cb244d85a7b353c9673.png)
③设A、B、
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3a007300b9ac250b6e07e1c9604af88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/787716df3d26ab22d3536dfcddb33c03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d532657b200ec89facfda06b44d190e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06430886275f5ad62bcda62fce691e99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea2f9ee07c64f43efb8144721f3ae222.png)
④已知点P为ABC内一点,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/925425ba47d596cfdf835509de804b56.png)
您最近一年使用:0次
填空题-双空题
|
较难
(0.4)
名校
解题方法
【推荐1】正三棱柱
中,所有棱长均为2,点E,F分别为棱
,
的中点,则直线EF与直线BC所成角的余弦值为_______ ;若过点A,E,F作一截面,则截面的周长为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
您最近一年使用:0次
填空题-双空题
|
较难
(0.4)
名校
解题方法
【推荐2】在
中,
,AB=2,点D在线段AC上,且AD=2DC,
,则BC的长为________ ,
的面积为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eaf03bc7996f5471db13e710a17ae618.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/081cb4ed8838b4f141fb1e37acad1742.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0005e1ef60f6ddc5f9a83e3de1ef3b2e.png)
您最近一年使用:0次