某公园现利用改地建设两块三角形花圃ABD与BCD,如图所示,其中
米,
米,
,且
.
![](https://img.xkw.com/dksih/QBM/2019/12/31/2367119581929472/2367691122499584/STEM/3e6a123b6ab04bd6932f9bd1b46e1916.png?resizew=148)
(1)若
,求
的大小;(精到
)
(2)当
为何值时,两块花圃的总面积最大?并求出此最大值.(精确到1平方米)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efcb5be5033e9bd4c2f58798a651e3f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fbb91d806e628cf978557ffad6a7020.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/856ec5e63ddd1398e67eaebfa55044fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a168e1c6985ad5fc914977ca160f71f.png)
![](https://img.xkw.com/dksih/QBM/2019/12/31/2367119581929472/2367691122499584/STEM/3e6a123b6ab04bd6932f9bd1b46e1916.png?resizew=148)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac9d295f00a7f3ff7b42402fd7410be7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2947ca8e0cdbeb4aab80ce9e7b63ba98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d15128f25ebca3d8f53eaf4f5f17a805.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2947ca8e0cdbeb4aab80ce9e7b63ba98.png)
17-18高一下·上海黄浦·期中 查看更多[3]
上海市黄浦区2017-2018学年高一下学期期中终调研测试数学试题上海市莘庄中学2022-2023学年高一下学期5月月考数学试题(已下线)重难点专题02 解三角形的应用-2022-2023学年高一数学重难点题型分类必刷题(人教B版2019必修第四册)
更新时间:2020-01-01 14:22:49
|
相似题推荐
解答题-问答题
|
较易
(0.85)
【推荐1】在
中,
分别是角
的对边,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c1ba07e7a73d022b99743224c61a745.png)
(1)求角
的大小;
(2)若
,求实数b的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c1ba07e7a73d022b99743224c61a745.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c2d770627f29a7c1fa6659ecee13b54.png)
您最近一年使用:0次
解答题-证明题
|
较易
(0.85)
名校
解题方法
【推荐2】已知
分别是
的角
的对边,
.
(1)求证:
;
(2)求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](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/4d6d8d358686e32b9858d889a259638b.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a2264c134952d41fb9bcb90e6c72c83.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b246aa3b56becc905d3fb64c6d5ec4a.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
解题方法
【推荐1】在
中,角
,
,
所对的边分别为
,
,
.
(1)证明:
;
(2)若
,
,
.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)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30efecee2afdad0e08cef68030d616e0.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f34365e5040ce6944115c8da61bf110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23725094c363fd158166a8698971694c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58e6178a3c0e760070b817a937fc3cbf.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
|
较易
(0.85)
名校
解题方法
【推荐2】已知
中,a,b,c分别为角A,B,C的对边,
.
(1)求角C的大小;
(2)若
,且
的面积为
,求
的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3ed5f237937e28566eb5a7dd169b8a0.png)
(1)求角C的大小;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bf4c55e68427cca325cfbddedcf84eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adbd3e8cf8325999cde03adf845d3dd0.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
|
较易
(0.85)
解题方法
【推荐1】设锐角三角形ABC的内角A,B,C的对边分别为a,b,c,已知![](https://staticzujuan.xkw.com/quesimg/Upload/formula/468516e531afc4e8877dc1a9f8ffb9fc.png)
(1)求角A的大小.
(2)若
,求c的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/468516e531afc4e8877dc1a9f8ffb9fc.png)
(1)求角A的大小.
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3320a13248a3a1208ff6ee85c9d26f36.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
名校
解题方法
【推荐2】已知函数
.
(Ⅰ)求函数
的最小正周期及单调递增区间;
(Ⅱ)在锐角
中,设角
、
、
所对的边分别是
、
、
,若
且
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7eda629054974a398c381d73800a2938.png)
(Ⅰ)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(Ⅱ)在锐角
![](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/42a30cdeccc312028502c30ca324d62e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65397f11ea8af736f38debadf420c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/980ab4deb9e7f2bc9288787f5243a4d2.png)
您最近一年使用:0次