记
的内角
的对边分别为
.已知
.
(1)求
;
(2)若
为
的中点,且
,求
.
![](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/e572674ea3c72f995282c1d6275e1427.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a51f9e65be8769bfbed00dd83b3d8784.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92daabae2aada36f619b9ae78aefe3e6.png)
更新时间:2024-05-10 09:12:14
|
相似题推荐
解答题-问答题
|
适中
(0.65)
解题方法
【推荐1】在
中,内角
,
,
对边的边长分别是
,
,
,已知:
,
.
(1)求
的值;
(2)若
,求
的面积.
![](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/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/534f33cc16d82470cbff68beffead264.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/114ea067ac2a4c0e1563f9d612186892.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/721e29b775e696045f44a4b1e7f74ef2.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fadd2e6f0aa16c2c466c904474ffc79c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐2】在
中,角
所对的边分别为
点
在一次函数
图像上.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/5/27/5ec726c0-a255-4d05-ba26-4755adfbf877.png?resizew=149)
(1)求
的值;
(2)如图所示,点
是边
上靠近
的三等分点,且
求
![](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/832a6ae04b25ef0896bd607cdcda60ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80909e59fb368f456575d59cdb8cde76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bc1cdc051f8059b140d9ea7b099dafd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/5/27/5ec726c0-a255-4d05-ba26-4755adfbf877.png?resizew=149)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5201fc26d013f6fb889933c0e32f5c53.png)
(2)如图所示,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4609f537f52f50addadee6d353e15bab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4d29f9cb3d877031aa578042aec421.png)
您最近一年使用:0次
【推荐1】已知
的内角A,
,
的对边长分别等于
,
,
,列举如下五个条件:
①
,②
,③
,④
,⑤
的周长等于6.
(1)请在①②③中选择其中一个条件作为依据,求角A的大小.(只需做出一种选择进行求解;多种选择的,按第一种选择评分.)
(2)在(1)的结论的基础上再在④⑤中选择其中一个作为添加条件,求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8a55a288892083f8b5a468ea688acc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5af4b6434998d2a4afbe18b4571fcac5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/266522ac99182eac030aa0ebc79fcd95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(1)请在①②③中选择其中一个条件作为依据,求角A的大小.(只需做出一种选择进行求解;多种选择的,按第一种选择评分.)
(2)在(1)的结论的基础上再在④⑤中选择其中一个作为添加条件,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐2】已知
的内角
的对边分别为
,点
在边
上,且满足
.
(1)若
,证明:
;
(2)若
,求
.
![](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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44ce75a9190b120a6d879352c637b2fd.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a5cf1426a12392e5ae44bed5c062d16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e21598fa1889b44b0db33c564f9b39a9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ca339d14f88395a8a6d51a230e035c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40bcf5c0ccfc3f1a40c4430246edf4c8.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
【推荐1】如图所示,在梯形ABCD中,
,
,四边形ACFE为矩形,且
平面ABCD,
.
![](https://img.xkw.com/dksih/QBM/2022/5/5/2973016492834816/2974529330372608/STEM/837b4fcbfecb4ae888b10f9d10c213b5.png?resizew=191)
(1)求证:
平面BCF;
(2)点M在线段EF上运动,当点M在什么位置时,平面MAB与平面FCB所成的锐二面角为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10df84d553a8826a7ce9bff4bf0d95b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5b0382c28547d3834ca71f3f0677695.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac0b72906641ed13716cfbce50923282.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b72f9d26318f501db675074e0dd9356.png)
![](https://img.xkw.com/dksih/QBM/2022/5/5/2973016492834816/2974529330372608/STEM/837b4fcbfecb4ae888b10f9d10c213b5.png?resizew=191)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a5f445af1ae136773cb338920552ff2.png)
(2)点M在线段EF上运动,当点M在什么位置时,平面MAB与平面FCB所成的锐二面角为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d88591679796c52024d11c4de641bdb.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】已知函数
.
(1)求
的单调递增区间;
(2)设
,
,
分别为
内角
,
,
的对边,已知
,
,且
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56930affadf8e571341d3fb4ced7909.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.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/874adf20cb27b7a20a1f4aafd0920325.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a64b4d679a2a1364ef822f2f0d04960.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4412a34091f001919005100be0679e36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次