1 .
内角
、
、
的对边分别是
、
、
,若
、
、
成等差数列,
,且
,则
( )
![](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/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/5a3c442579603164f3fc19458677d307.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4c5cd6ce30ac70cd343334139c1a478.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fbaa87bd53b4915bd5691485cfd2ebf.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2022-08-28更新
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826次组卷
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5卷引用:山西大学附属中学校2022-2023学年高三上学期11月期中考试数学试题
名校
2 . 椭圆
的左、右焦点分别为
为椭圆上一点,若
,则
等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0acaf04006c36aeef6a010fe67f8a288.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76ed463bf16c78a4bbb9d3acff922afa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77d2350fe1332edb4004cb4c5016f4a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a881309775c3b6a9f4ed408838666342.png)
A.1 | B.![]() | C.![]() | D.2 |
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2021-11-25更新
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888次组卷
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2卷引用:山西省怀仁市第一中学2021-2022学年高二上学期期中数学(理)试题
名校
解题方法
3 . 在
中,角A,B,C的对边分别为a,b,c,且
.
(1)求角A的大小;
(2)若
,求a的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c40bae5e85ba75432fea27bb3d1643c9.png)
(1)求角A的大小;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aebc60ea2ea1fb965e05a05c9de7f807.png)
您最近一年使用:0次
2022-08-17更新
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1436次组卷
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15卷引用:山西省临汾市洪洞县第一中学2020届高三上学期期中数学(理)试题
山西省临汾市洪洞县第一中学2020届高三上学期期中数学(理)试题【全国百强校】黑龙江省大庆实验中学2018-2019学年高一下学期期中考试数学(文)试题【全国百强校】黑龙江省大庆市大庆实验中学2018-2019学年高一下学期期中考试数学(理)试题湖北省黄冈市黄梅县国际育才高级中学2019-2020学年高一下学期期中数学试题【市级联考】陕西省咸阳市2018-2019学年高二上学期期末考试数学(文)试题【市级联考】陕西省咸阳市2018-2019学年高二上学期期末考试数学(理)试题湖北省襄阳市第四中学2019-2020学年高一下学期4月月考数学试题湖北省武汉市第三中学2019-2020学年高一下学期5月月考数学试题(已下线)专题02解三角形-讲案(理科)第一篇 热点、难点突破篇-《2022年高考理科数学二轮复习讲练测》(全国课标版)(已下线)专题02解三角形-讲案(文科)第一篇 热点、难点突破篇-《2022年高考文科数学二轮复习讲练测》(全国课标版)苏教版(2019) 必修第二册 必杀技 第11章 解三角形 素养检测(已下线)第08讲 拓展三:三角形中面积(定值,最值,取值范围)问题 (高频考点精讲)山东省滨州市沾化区实验高级中学2022-2023学年高二上学期第二次月考数学试题人教A版(2019) 必修第二册 必杀技 第6章 素养检测安徽省亳州市蒙城县第八中学2023届高三下学期第二次月考数学试卷
名校
解题方法
4 . 在直三棱柱
中,
,二面角
的大小为
,点
到平面
的距离为
,点
到平面
的距离为
,则异面直线
与
所成角的余弦值为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55a2310cbba5e050488cd9296eb195d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1654dfe63f11563eadbaee32dae7b1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
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名校
5 . 在
中,角A,B,C所对的边分别为a,b,c,
,则
外接圆的面积是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e4649caf9c38657324839a48cf17635.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
6 . 如图,在四棱锥
中,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/31/68466e5f-60be-492b-918d-5cb2a08b7732.png?resizew=164)
(1)求证:平面
平面
;
(2)在线段
上是否存在异于P,C的一点M,使平面
与平面
夹角的余弦值为
?若存在,求出点M的位置;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff0857fe163cf4f926bbbca31ac1d255.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/31/68466e5f-60be-492b-918d-5cb2a08b7732.png?resizew=164)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f04c222223dae9ef27d4c132534d9848.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f571a1aac46c6d0cf440c0ec2846bf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bc46688d8723cf2003fc25890265200.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1174142f3bba761585b6bc2653009b36.png)
您最近一年使用:0次
解题方法
7 . 在
中,内角A、B、C的对边分别是a、b、c,
,
时.
(1)若
,求c;
(2)记
,
是直角三角形,求k的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c3a1f1a37e69b2dc06bf0affd58f22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23725094c363fd158166a8698971694c.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f34365e5040ce6944115c8da61bf110.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/885b399ef87cef3372eb758165ad1e61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
2021-11-17更新
|
569次组卷
|
5卷引用:山西省怀仁市2022届高三上学期期中数学(文)试题
山西省怀仁市2022届高三上学期期中数学(文)试题(已下线)期中考测试(基础)-2021-2022学年高一数学一隅三反系列(人教A版2019必修第二册)(已下线)重难点03 四种三角函数与解三角形数学思想(核心考点讲与练)-2023年高考数学一轮复习核心考点讲与练(新高考专用)福建省龙岩市上杭县才溪中学2024届高三上学期第一次月考数学试题云南省红河州绿春县高级中学2021-2022学年高二上学期期末模拟数学(理)试题
解题方法
8 . 在
中,内角
、
、
的对边分别是
、
、
,
,
平分
交
于
,
.
(1)求
面积
的最小值;
(2)已知
,求
面积
.
![](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/9680bd6f250acb8b568510419b59d3e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.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/3f4aca5534bce25acaeb7379deed8f8f.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fcc480016747ca3595a20507ff3c2c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
您最近一年使用:0次
名校
解题方法
9 . 在面积为
的
中;内角
、
、
所对的边分别为
、
、
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0998625a64f7221a13fa9df0f8c8e299.png)
,则
( )
![](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/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/d82601fec3197cda183d2e33d1889426.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0998625a64f7221a13fa9df0f8c8e299.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66ebf6e00b6919482776f9102f327d7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f774cd650f14c8f6e4fe0c6a432768bb.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2021-09-03更新
|
308次组卷
|
4卷引用:山西省大同市灵丘一中、广灵一中2020-2021学年高一下学期期中联考数学试题
10 . 在①
;②
;③
这三个条件中任选一个,补充在下面问题中,并解答.
问题:已知
的内角
所对的边分别为
,___________.
(1)求A;
(2)若
的面积是
,求
的周长.
(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/d0f4899b6c0f81d7a5a19e5dfc06b999.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02522c49d028b4ab111cd3b73fb9a563.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb8391a30a191b22e483db135fd476cd.png)
问题:已知
![](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)
(1)求A;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/818b79c5c0af1ad3ed94a2ec47f4cfa6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(注:如果选择多个条件分别解答,按第一个解答计分)
您最近一年使用:0次
2021-09-02更新
|
420次组卷
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3卷引用:山西省长治市第四中学校2021-2022学年高一下学期期中理科数学试题