已知
的内角
所对的边分别为
,若
.
(1)求
的面积;
(2)求AC边的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9178fc8b5d65aa75fa9196294a0db7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3470f8e8142a61cfd3d4aa1e1e203d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a5d3cb8d09449215d61149940c2138a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc696b68e067c0239da5aeaa0f9b5ea2.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9178fc8b5d65aa75fa9196294a0db7e.png)
(2)求AC边的最小值.
更新时间:2017-03-13 16:24:29
|
相似题推荐
解答题-问答题
|
适中
(0.65)
解题方法
【推荐1】在
中,角
所对的边分别为
,且满足
.
(Ⅰ)判断
的形状;
(Ⅱ)求
的取值范围.
![](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/2681f0d1732bcaa8d6362fbd1fa6caa2.png)
(Ⅰ)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(Ⅱ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/141ad600cb5a787f79e522b07efb9e52.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)求函数
的最小正周期和对称轴方程;
(2)
中,角A,B,C所对的边分别为a,b,c,且A为锐角,若
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/908b576754566eb72a2cdcfab5afa3db.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14513079b46a3ad4d98741287417ed9a.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)
【推荐1】 在
中,内角A、
、
的对边分别为
,且
.
(1)求
;
(2)若
,求
及
的面积.
![](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/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47a98be1b9844d3ad24130cd9364d262.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6545eb2236c1c3df4204e59cc4b8d1af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.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
【推荐1】如图所示,公路
一侧有一块空地
,其中
,市政府拟在中间开挖一个人工湖
,其中
都在边
上(
不与
重合,
在
之间),且
.
![](https://img.xkw.com/dksih/QBM/2022/4/15/2958743111925760/2960180743790592/STEM/3a6ccadb-fd14-4479-a6e5-721b3d425a34.png?resizew=251)
(1)若
在距离A点
处,求
和
的长度;
(2)为节省投入资金,人工湖
的面积尽可能小,设
,试确定
的值,使
的面积最小,并求出最小面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f643e4aaa1719086a91d781d90563d9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25dd698d57d1cf239eb8752aecaaa4f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/898db7807a160f0c7b17e68615699a07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c3fe26b378cb2665c06c5d8039d675.png)
![](https://img.xkw.com/dksih/QBM/2022/4/15/2958743111925760/2960180743790592/STEM/3a6ccadb-fd14-4479-a6e5-721b3d425a34.png?resizew=251)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2bd4f1b3a3f3e534c5c3b39266f1ac8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
(2)为节省投入资金,人工湖
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25dd698d57d1cf239eb8752aecaaa4f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb4fddc8045e815ffa58cff4bed74d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25dd698d57d1cf239eb8752aecaaa4f4.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,设角A,B,C的对边长分别为a,b,c,已知
.
(1)求角B的值;
(2)若
为锐角三角形,且c=1,求
的面积S的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ed1fc1b10d2f7ad8d03f04d4b33b326.png)
(1)求角B的值;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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
【推荐3】在临港滴水湖畔拟建造一个四边形的露营基地,如图ABCD所示.为考虑露营客人娱乐休闲的需求,在四边形ABCD区域中,将三角形ABD区域设立成花卉观赏区,三角形BCD区域设立成烧烤区,边AB、BC、CD、DA修建观赏步道,边BD修建隔离防护栏,其中
米,
米,
.
(2)考虑到烧烤区的安全性,在规划四边形ABCD区域时,首先保证烧烤区的占地面积最大时,再使得花卉观赏区的面积尽可能大,则应如何设计观赏步道?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff2dcf2debb4c733c88061662bd22a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68e7cdc183f6e2f163aa1e4caeb485e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c3a1f1a37e69b2dc06bf0affd58f22.png)
(2)考虑到烧烤区的安全性,在规划四边形ABCD区域时,首先保证烧烤区的占地面积最大时,再使得花卉观赏区的面积尽可能大,则应如何设计观赏步道?
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1】已知
,
,
.
(1)求
与
的夹角
;
(2)求
;
(3)若
,
,求
的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b26ce5cec4162f1cfd2234f6904b313.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a968c3243ef34e38fa70f18757227b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc7a1d93a861c2f00da3e2548e7762e1.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a92e6eba8dab638fd66831cd3a0b6d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/427fa45527d0ce469bfd060bf6f991f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99290b458ca61c520a98c63bfc789271.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b536ac375a0b74e9c7efbc585f987f72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c938b653b6c5081a0bc442bf2c8e0a.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
【推荐2】已知△ABC中,角A,B,C所对的边分别是a,b,c,向量
(
,
),![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36f1a8e551cba7ec9f451749f60e628d.png)
(
,
),且
.
(1)若
,求A及
的值;
(2)若a=3,求△ABC周长的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c2e7d089be43836712e89688b5c211e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7fe4477d38c7fe9c629df6be2668a5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7ec189df9aa2b3c46de719d0057a05f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36f1a8e551cba7ec9f451749f60e628d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25504683f7f3ab3008ba5b9f38018557.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29b96a09f3ef35dbe550bd085f2c37f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a70d446e6fc756806938596817fd1bd.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/699754418319036638fc867237888f24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/721e29b775e696045f44a4b1e7f74ef2.png)
(2)若a=3,求△ABC周长的取值范围.
您最近一年使用:0次