![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38335830b93ac4d99c28a8e209eecb3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7f5573b30734d65648f61c0a94c98de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bc9447a6bd92493041b63bf3b6a4e0d.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bd5b9bbd3d22bd2cef53dd4b9691257.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
更新时间:2017-10-18 18:23:41
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相似题推荐
解答题-问答题
|
适中
(0.65)
名校
【推荐1】已知函数
的图象向右平移
个单位后得到函数
的图象.
(1)求函数
在区间
上的最值;
(2)若
,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ec21434e5f483a6ac1da139c5c911d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e73529eb0880cb7bd3505a183a3d95f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2f8368f7daaae96338581b7ad1e5d13.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cff94de6bc8afb2f83874e54a37592a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6788d21fc9dde7140ec2816c0fece52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7590f79f83f7c2ec33c8ff4a0b23363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e85d7be3f24408dc847776d48e71bae.png)
您最近一年使用:0次
解答题-问答题
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适中
(0.65)
【推荐2】在
中,角
所对的边分别为
且满足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d464cfa11315c41fced11c42d4f9e132.png)
(1)求角
的大小;
(2)求
的最大值,并求取得最大值时角
的大小.
![](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/d464cfa11315c41fced11c42d4f9e132.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/631c02ba8c4bbfee0141bfb312cce2b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.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1】在
中,内角
、
、
的对边分别为
、
、
,且
.
![](https://img.xkw.com/dksih/QBM/2021/1/23/2642464959455232/2645184514195456/STEM/7f09a967-47ac-44d7-80cb-fc72f448a70d.png?resizew=266)
(1)求
;
(2)已知
,
,延长
至
,使得
,求
.
![](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/81b25404d19336f574dd5b62af189ba4.png)
![](https://img.xkw.com/dksih/QBM/2021/1/23/2642464959455232/2645184514195456/STEM/7f09a967-47ac-44d7-80cb-fc72f448a70d.png?resizew=266)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d3a7e3355ee508b11f19c15e28dfeab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbeb8ebe198bb9ef37b5c57027b28821.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.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】在
中,内角
,
,
的对边分别为
,
,
,已知
.
(1)求角
;
(2)若
,
是
的中点,
,求边
.
![](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/3eaa5dd0bb3766c0f0e62d6f2d2aa262.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.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/bf9ad150cb1e4cd8977d4cc3d99be17c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
您最近一年使用:0次
【推荐1】在△ABC中,角A,B,C所对边分别为a,b,c,已知
.
(1)求角B的大小;
(2)给出三个条件:①
;②
;③
,从中选出两个作为已知条件,求△ABC的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd1de475b515e1fc3e5457dfda84b808.png)
(1)求角B的大小;
(2)给出三个条件:①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5742b2684d00be50a66e01c9acb6b51f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6e7768bd54153142135477dd9786745.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ea780a94336bd34c9f496a40025eb77.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】在①
;②
(
为
的面积);③![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c28491c82e7754c94562159e719cb0ff.png)
这三个条件中任选一个,补充到下面的问题中,并作答.在
中,角
,
,
所对的边分别为
,
,
,______,
为
的角平分线,且
.求角
的大小及
面积的最小值.注:如果选择多个条件分别解答,按第一个解答计分.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ef8ad9f9cf060771d47d36cde93afae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08bd210621d1fb24caee33c87643839b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c28491c82e7754c94562159e719cb0ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e211ab9cc985080d08fd4fd92000e829.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/9a0b1a93ef14b1120f13b2749a5ba4f7.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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d783fe7f3ce673d5d21281174e7a7968.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
解题方法
【推荐1】在
中,角
,
,
所对的边分别是
,
,
,且
.
(1)求证:三内角
,
,
成等差数列;
(2)若
的面积为
,
,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/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/f5cebb82cc09cb0ab0c50a268edb9bee.png)
(1)求证:三内角
![](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)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edb57d84f9bbcb3e30d4ce7e2e1e8604.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d78de7dac9af2a4bd28ae06e5c67239e.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】在意大利,有一座满是“斗笠”的灰白小镇阿尔贝罗贝洛(Alberobello),这些圆锥形屋顶的奇特小屋名叫Trullo,于1996年被收入世界文化遗产名录(如图1).现测量一个屋顶,得到圆锥SO的底面直径AB长为12m,母线SA长为18m(如图2).C,D是母线SA的两个三等分点(点D靠近点A),E是母线SB的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/53dda524-5c5e-4c93-bc98-d746d5471578.png?resizew=373)
(1)从点A到点C绕屋顶侧面一周安装灯光带,求灯光带的最小长度;
(2)现对屋顶进行加固,在底面直径AB上某一点P,向点D和点E分别引直线型钢管PD和PE.试确定点P的位置,使得钢管总长度最小.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/53dda524-5c5e-4c93-bc98-d746d5471578.png?resizew=373)
(1)从点A到点C绕屋顶侧面一周安装灯光带,求灯光带的最小长度;
(2)现对屋顶进行加固,在底面直径AB上某一点P,向点D和点E分别引直线型钢管PD和PE.试确定点P的位置,使得钢管总长度最小.
您最近一年使用:0次