名校
1 . 如图,在
中,点
在边
上,且
.记
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/7af8525b-629f-41ce-a3ab-e8a444056401.png?resizew=192)
(1)求证:
;
(2)若
,
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/299d7fba9e66b71eef7895ab9d073354.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74491945847aa130dae78e6a8cb6f914.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12ea718698b44ab67a5dac6206e54f0d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/7af8525b-629f-41ce-a3ab-e8a444056401.png?resizew=192)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0485afba4758035a1a93a1b8d4752852.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c95fa7f61564978c8e26616bc14449e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/841c4de47727d62aa60a33530bb6d958.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bc4844d3dd1b55de4c9f6c173845bac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
您最近一年使用:0次
2021-12-15更新
|
910次组卷
|
2卷引用:山东省潍坊市2021-2022学年高三上学期12月优秀生抽测数学试题
2 . 已知
中,内角
、
、
的对边分别为
、
、
,
为
的角平分线.
![](https://img.xkw.com/dksih/QBM/2021/12/6/2866936566300672/2869727451389952/STEM/bfb0b953b8fa40e8b5992311635f99da.png?resizew=185)
(1)求证:
;
(2)若
且
,求
的大小.
![](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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://img.xkw.com/dksih/QBM/2021/12/6/2866936566300672/2869727451389952/STEM/bfb0b953b8fa40e8b5992311635f99da.png?resizew=185)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25c718ea35aad62ad670986f7b2a36fb.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc490fd9c850622aa2beaf5d38d46459.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18af922d7bcd7a1bfbd89398d86eda5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d54d09ef825305de83671448a3dea21.png)
您最近一年使用:0次
2021-12-10更新
|
1131次组卷
|
6卷引用:湖北省鄂北六校2021-2022学年高三上学期期中联考数学试题
湖北省鄂北六校2021-2022学年高三上学期期中联考数学试题(已下线)2020年高考江苏数学高考真题变式题16-20题(已下线)专题12 中线、高线、角平分线问题-【重难点突破】2021-2022学年高一数学常考题专练(人教A版2019必修第二册) (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)5.4 正、余弦定理(精练)(提升版)-2(已下线)专题05 解三角形在几何与实际中的应用(2)-期中期末考点大串讲
名校
解题方法
3 . 在锐角
中, 角
的对边分别为
,已知
.
(1)求证:
.
(2)若
,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/ec4b3db2bf74ecf82df9a2200e84e304.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f44c181a2f6ae22d5d52b374768dc57.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4580cc037c0c760c728cdbb74a8154c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
您最近一年使用:0次
名校
4 . 在
中,角
,
,
的对边分别为
,
,
,已知
,且
,
.
(1)求证:
;
(2)求
的面积.
![](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/1feae4bceb29e2cc6b9d3d1b8584566d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e38f550e95b2950f91e8ec1798b94109.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb1ec9c5eaed4c211a040a2a33fb7c91.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fcc6344214f83746992e1a53ded5c10.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
2022-01-11更新
|
676次组卷
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8卷引用:湖北省新高考联考协作体2021-2022学年高三上学期12月联考数学试题
湖北省新高考联考协作体2021-2022学年高三上学期12月联考数学试题 湖南省衡阳市第八中学2021-2022学年高三上学期第五次月考数学试题(已下线)解密08 正、余弦定理及解三角形(分层训练)-【高频考点解密】2022年高考数学二轮复习讲义+分层训练(全国通用)江苏省连云港市厉庄高级中学2022-2023学年高三上学期第一次质量检测数学试题陕西省宝鸡市金台区2022-2023学年高三上学期10月教学质量检测理科数学试题安徽省滁州市定远县民族中学2022-2023学年高三上学期12月月考数学试题陕西省咸阳市武功县普集高级中学2023届高三下学期五模文科数学试题江苏省无锡市锡东高级中学2023-2024学年高一下学期5月月考数学试卷
5 .
的内角
,
,
的对边分别为
,
,
,已知
.
(1)求证:
,
,
成等差数列;
(2)求
的最大值.
![](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/c07fa325eda3e2e5dd200c8c4f0382af.png)
(1)求证:
![](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)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
您最近一年使用:0次
6 . 如图,在四边形
中,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb31ef428bd9de9bc875b343feded3c7.png)
.
![](https://img.xkw.com/dksih/QBM/2022/1/21/2899111846027264/2900590912176128/STEM/9534124a-8802-432f-b72c-39bb87e6e79f.png?resizew=331)
(1)求证:
;
(2)若
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb31ef428bd9de9bc875b343feded3c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f508f9180bb691af987f60d5aff9066.png)
![](https://img.xkw.com/dksih/QBM/2022/1/21/2899111846027264/2900590912176128/STEM/9534124a-8802-432f-b72c-39bb87e6e79f.png?resizew=331)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04fecb4bcdaa27bfa8a47ec151d7d44c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
您最近一年使用:0次
2022-01-23更新
|
586次组卷
|
2卷引用:山东省青岛市4区县2021-2022学年高三上学期期末考试数学试题
名校
7 . 如图,在
中,
,
,
,
是
内部一点,且
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/01d5f55d-13fe-434a-894c-dc816ba01225.png?resizew=200)
(1)求
的长;
(2)求证:
为等腰三角形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06201e4f55b78d8b30afb257d5a1b16b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4474a2abc0e638b50e82de1c76ad02c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f81e24376a13d648c2ed0dc73bc710e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db07adbfb878e969f574d220e787d6ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bef81738c7d3a73a396e6344ade130db.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/01d5f55d-13fe-434a-894c-dc816ba01225.png?resizew=200)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2b83beedb3438153e6f728545fe3e03.png)
您最近一年使用:0次
名校
8 . 如图所示,在直三棱柱
中,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/2022/3/9/2932407471497216/2946024085012480/STEM/bbc929a7-9dd3-4c7f-89c0-9342e25bbbf6.png?resizew=140)
(1)当P为
的中点时,求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
平面
;
(2)当P为
的中点时,求二面角
的正切值;
(3)若点P为线段
上的动点,求当
取得最小值时,线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df09d04a0c1a9c47aa547811469a6e0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e1f4f255d191786f7d330d278868c2d.png)
![](https://img.xkw.com/dksih/QBM/2022/3/9/2932407471497216/2946024085012480/STEM/bbc929a7-9dd3-4c7f-89c0-9342e25bbbf6.png?resizew=140)
(1)当P为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f06ed3e88f623ed9313d06b1bb2a87ee.png)
(2)当P为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de1268d3b868d5e107fde84f4ae5f799.png)
(3)若点P为线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb88a50d8b1ba6b57083f55b32de9a05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6655c413f509068d30b165f9d92bdba0.png)
您最近一年使用:0次
9 . △ABC是等腰直角三角形,∠B=90°,D是边BC的中点,BE⊥AD,垂足为E,延长BE交AC于F,连接DF,求证:∠ADB=∠FDC.
您最近一年使用:0次
10 . 已知
中,点M在边
上,
,
,
.
(1)求证:
是等腰三角形;
(2)若
,求
与
的面积之差.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40f1312fb1d68a17a632064f83a46d42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b1ca6d381ca573077f690836c551eef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a692ca2ea6902d5628bffc889a478eef.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dddb32a7a5c157fdf8aa049b2d665b4c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fcd197570a810c014cf1bbba51ff927.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a5e0a51c9e14fb246b0ba0b231c1e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dddb32a7a5c157fdf8aa049b2d665b4c.png)
您最近一年使用:0次
2021-12-16更新
|
298次组卷
|
3卷引用:河南省名校联盟2021-2022学年高三上学期毕业班阶段性测试(三)文科数学试题