已知
中,角
,
,
的对边分别为a,
,c,点
为
边的中点,
,
.
(1)求
的值;
(2)求
的周长.
![](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/2c94bb12cee76221e13f9ef955b0aab1.png)
![](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/9f7effd003be6d3a4a5fe39ecc7e4f5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a0621f13b09fae1b0cfc83ff1d9a62e.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
更新时间:2023-05-20 11:52:55
|
相似题推荐
解答题-问答题
|
适中
(0.65)
解题方法
【推荐1】在①
,②
,③
三个条件中任选一个补充在下面的横线上,并加以解答.
在
中,角A,B,C的对边分别为a,b,c且选条件:______.
(1)求
;
(2)作
,使得四边形ABCD满足
,
,求BC的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c1ba07e7a73d022b99743224c61a745.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b63f13c587461426432358d5480438a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e04fe2d9f111149412279513f4b69df.png)
在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/27/0ea3212e-e563-4e49-af04-1d12ead263d8.png?resizew=134)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
(2)作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a06aa91c5d3dc4e9791d4723aa2a345.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d4746df85049d1651d3f6c30212a7a9.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
解题方法
【推荐2】
的内角A,B,C的对边分别为a,b,c,已知
的面积为
.
(1)求
的值和
的取值范围;
(2)若
为钝角三角形,且
,分别求C和
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61167d8d50e1a441d947cf9d2623ff9e.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35cf3716c6ce40d92534a81fdbe2db3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cef8b3a739286b22d21fb29294d4ae0.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb9002ebedd6245713ff8a07d75cd76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bfb0bbf86f8da2c412e3b3210aef356.png)
您最近一年使用:0次
【推荐1】已知
的内角A,B,C所对的边分别为a,b,c,且
.
(1)求A;
(2)若
的面积为
,从条件①、条件②这两个条件中选择一个作为已知,求
的周长.
①边BC的中点为D,且
;②角A的平分线交边BC于点E,且
.
注:如果选择条件①和条件②分别解答,按第一个解答计分.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96793c8f0349d9ae077f5cd8f0330678.png)
(1)求A;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
①边BC的中点为D,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7650cede07c4758a9b3bb1da4553acc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4ca3a231d2ecb2d712a159fc51512c3.png)
注:如果选择条件①和条件②分别解答,按第一个解答计分.
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
解题方法
【推荐2】如图,在
中,
,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/1/fdd98dd6-cc10-4d70-a4a2-477b894d4b69.png?resizew=148)
(1)若
,求
的最大值.
(2)若
,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b57fdd2a3642716fcf5100011eb3ec88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3ad819abc817030381444a01b3e5fc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79f8f4051b5dbc94620f44d93a862d28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2d2919e5bd26b5e9be672a3ff7604cd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/1/fdd98dd6-cc10-4d70-a4a2-477b894d4b69.png?resizew=148)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b3cf0f585938ede9eca890a6eb326d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4c41a83255a091e4cdf5c1150224842.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03234cdf2a49c059aa98e5384f691af5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/555503767f3e0f11dfae5a31c2a85fc0.png)
您最近一年使用:0次
【推荐1】在①
,②
,③
这三个条件中任选一个,补充到下面问题中,并解答问题.
在
中,内角
,
,
的对边分别为
,
,
,且______.
(1)求
;
(2)若
,求
面积的最大值.
注:如果选择多个条件分别解答,则按第一个解答计分.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ac2101e4807411453216b43bda879cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/283fd0452a8d05e88d31fa14a5b59a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dbfc42f41e9f799324b1b5e66721bb5.png)
在
![](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)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f08ce80e91fdf435a8e3ec05be990e9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
注:如果选择多个条件分别解答,则按第一个解答计分.
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】已知
中,角A,B,C所对的边分别为a,b,c,且
,
,
(
为
的面积).
(Ⅰ)求
的值;
(Ⅱ)已知点M在线段
上,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daea073d2e1c02defc9fe9b115914355.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad09921d9904335a83078262ce62a473.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28b68180f96a595aaab53f465851cdb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5cbff84327e964f912a54032e76ccc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(Ⅰ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a24a8f5e8fb89381f8add6549170345.png)
(Ⅱ)已知点M在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c21803817ff51574b6c431d7458c2ce5.png)
您最近一年使用:0次