1 . 如图,在平面四边形ABCD中,对角线
平分
的内角A、B、C的对边分别为a、b、c.已知
.
![](https://img.xkw.com/dksih/QBM/2022/4/29/2968697658761216/2973433624428544/STEM/5d2f7a87-cadd-4659-8e68-9f86a4cdf4fc.png?resizew=167)
(1)求B;
(2)若
,且________,求线段
的长.从下面①②中任选一个,补充在上面的空格中进行求解.①△ABC的面积
;②
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c4d4b9d5c56841c140bc89f2a471819.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0c16430ef03949eeeb67659348de7c5.png)
![](https://img.xkw.com/dksih/QBM/2022/4/29/2968697658761216/2973433624428544/STEM/5d2f7a87-cadd-4659-8e68-9f86a4cdf4fc.png?resizew=167)
(1)求B;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/292d0b9ce587bd5df884a988c22ccba2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd08ea81c6db2ca24f3af86d4809991.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/025df2a9934b457cf20d91604e430612.png)
您最近一年使用:0次
2022-05-06更新
|
1148次组卷
|
8卷引用:四川省泸州市2021-2022学高三第一次教学质量诊断性考试数学(理)试题
四川省泸州市2021-2022学高三第一次教学质量诊断性考试数学(理)试题四川省泸州市2021-2022学年高三第一次教学质量诊断性考试数学(文)试题(已下线)热点02 三角恒等变换与解三角形-2022年高考数学【热点·重点·难点】专练(全国通用)(已下线)重难点02 三角函数与解三角形-2022年高考数学【热点·重点·难点】专练(新高考专用)河南宋基信阳实验中学2021-2022学年高二下学期第二次月考数学(理)试题(已下线)押全国卷(理科)第17题 解三角形与数列-备战2022年高考数学(理)临考题号押题(全国卷)(已下线)第05讲 正弦定理和余弦定理的应用 (精练)-2023年高考数学一轮复习讲练测(新教材新高考)(已下线)专题15 解三角形及其应用(讲义)-2023年高考数学一轮复习精讲精练宝典(新高考专用)
名校
解题方法
2 . 在
中,
,
平分
交
于点D,已知
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/d233882a-a1e3-4bbf-aae4-01216a547410.png?resizew=160)
(1)求
;
(2)求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4474a2abc0e638b50e82de1c76ad02c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d79e7020414add95907e061df505ef0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61fda819f0b890ee07fae86000b8915d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/d233882a-a1e3-4bbf-aae4-01216a547410.png?resizew=160)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3716f4899e80487212cdd23b1ee8a342.png)
您最近一年使用:0次
2020-07-16更新
|
450次组卷
|
5卷引用:四川省资阳中学2022 届高三上学期第一次质量检测数学试题