在
中,
,
,
分别为内角
,
,
的对边,已知
.
(1)求
.
(2)若
的周长为
,面积为
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/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/6eb0e6bc5f98fbd25b5fb1f2e0e463cf.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab46ea0cba2d06283fae3d864a2329e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/802e162b98c280720fcb909cf392fda3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
更新时间:2021-08-28 10:25:29
|
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】在三角形
中,角A,B,C所对应的边分别为a,b,c,且
.
(1)从下列中选择一个证明:
①证明:
;②证明:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b22500a705ee509cc9633585b95df252.png)
(2)求三角形
面积的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/118046cea3444ffb4a200a70a9612d42.png)
(1)从下列中选择一个证明:
①证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bcf9a85dda185f77d852e4b5444ac4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b22500a705ee509cc9633585b95df252.png)
(2)求三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
【推荐2】在
中,内角
、
、
的对边分别为
,
,
,设
,且
.
(1)求角
;
(2)若
的面积为
,且
,求
的值.
![](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/68a16689e89c5ad56cc6ca0480321c3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abe37d42061daef3455fd7774e99b392.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa42cc6c0e10ab9209ff76ab52f57b4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】已知
的角
所对的边分别是
,设向量![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b07a7b1521a755f7bd167ae92de02a28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d7f9b4fb58f92b1e01d8610e727d7a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d88eff0b1ef29d011f5150b5200dda9.png)
若
求角B的大小;
(Ⅱ)若
边长c=2,角
求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.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/b07a7b1521a755f7bd167ae92de02a28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d7f9b4fb58f92b1e01d8610e727d7a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d88eff0b1ef29d011f5150b5200dda9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2342f64449927ccacfb945034d39389.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f41c3486d60b1a02ecd65e97e795ba6.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbf0e4d882ade164be6dac3c0781f28b.png)
![](https://img.xkw.com/dksih/QBM/2012/9/9/1571008549011456/1571008554565632/STEM/96f4f0ab59874b84a12ef9f6c4586d77.png?resizew=51)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.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,
分别是角
的对边,并且
(1)若
,
,求
的面积;
(2)求
的最大值.
![](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/155ecc4a22a0933429ed61e214a7aa27.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b1a7b6f0d417eab8cb47d187e85b506.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2bcb0cf5182f70cf5f2737b709b4a9c.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1】记△ABC的内角A,B,C的对边分别为a,b,c,已知
.
(1)若
,求A,B;
(2)若△ABC为锐角三角形,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddd96f60aa7619a80486b98e255cf3e6.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/347f1001c7ef728ec091358493d3cb59.png)
(2)若△ABC为锐角三角形,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1710ea041cbbf5df7e8ae5b31d9951c3.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】记
的内角A,B,C的对边分别为a,b,c,已知
,
.
(1)求C;
(2)若D是
边的中点,且
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7698b51bec3a5cb6ac3c20a055dc498.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2ff9fd5a2c3a2fbe0185d94d1ac4a5e.png)
(1)求C;
(2)若D是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c30cd7b77f8f6f0b9286ba4a6103f10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次