2020·全国·模拟预测
解题方法
1 . 已知在
中,
.
(1)求角
;
(2)若
为
边上靠近点
的三等分点,且
,
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/becadd2751d1cfda51f466136216a9e5.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74bae651529e60da7d1de9c997206cdf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d4746df85049d1651d3f6c30212a7a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
2020·全国·模拟预测
2 . 《九章算术》商功章中记载的几何体“堑堵”,是指底面为直角三角形的直棱柱.现有堑堵
,其中
,
,且异面直线
与
所成角的正弦值为
,则该堑堵的体积为______ .
![](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/e7ad3a578f403b9e6b97fa2dc955fc11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eac97e6740365c85ad857aff85cefbe5.png)
![](https://img.xkw.com/dksih/QBM/2021/1/5/2629675279769600/2630962512674816/STEM/e654c9738f494e38b3c1c3763fd366d2.png?resizew=127)
您最近一年使用:0次
3 . 在①
,②
,③
这三个条件中任选一个,补充在下面问题中,并求解.
在
中,角
,
的对边分别为
,
,
,______,
为
边上靠近点A的三等分点,
,
的面积
,求
.
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/a8aaca0697ce2b2429ad66d4dd7280e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7e0a832d9d4551ceaba04a377d1a3ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19d0d69ba0d4b8dfade1279a87cf8131.png)
在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.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/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58612498c315f09f34ac533f2fac4f00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6629fbe2eef7def1afa88acbbabdb10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d3dcbb853e4b9fd1d011bd5f1948018.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.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
2020·全国·模拟预测
解题方法
4 . 在①
,②
,③
这三个条件中任选一个,补充在下面的横线上,并解答.已知在锐角
中,内角
,
,
的对边分别为
,
,
,____________,求
的取值范围.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/1ae8319f02578867ea5be7f5025845c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c4920a50fe76b52becfc3dac2efcda7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80af251eeadfe4343d36c4198b341c86.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/2bf636d8e3c0302c748d6e8163b814ad.png)
您最近一年使用:0次
2020·全国·模拟预测
名校
解题方法
5 . 在锐角
中,角
,
,
的对边分别为
,
,
,且满足
.
(1)求角A的大小;
(2)求
的取值范围.
![](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/e1d8c3997bcce47b0cb16b027995220c.png)
(1)求角A的大小;
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42021389e784e1d80ef746196164b0c9.png)
您最近一年使用:0次
2020·全国·模拟预测
名校
解题方法
6 . 在①
,其中
为角
的平分线
的长(
与
交于点
),②
,③
这三个条件中任选一个,补充在下面问题中,并解答.在
中,内角
,
,
的对边分别为
,
,
,______.
(1)求角
的大小;
(2)若
,
,
为
的重心,求
的长.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/4c26e64b749a5d27cde81929601484a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.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/f14d7e497c6f1200dc3e034b45fc93b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/483508caa25ed7a6da5e471bdfe6fd18.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)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a3c442579603164f3fc19458677d307.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6de1d395e6c48c0676a1488a299479d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
您最近一年使用:0次
2021-01-05更新
|
1285次组卷
|
4卷引用:2021年全国高中名校名师原创预测卷新高考数学(第四模拟)
(已下线)2021年全国高中名校名师原创预测卷新高考数学(第四模拟)安徽省池州市贵池区2021-2022学年高一下学期期中数学试题(已下线)三省三校2022届高三下学期第一次模拟数学(理)试题变式题16-20黑龙江省哈尔滨市第一中学校2021-2022学年高三上学期期中考试数学(理科)试题
2020·全国·模拟预测
解题方法
7 . 在
中,角
,
,
的对边分别是
,
,
,
,
的面积为
.
(1)求
的最小值;
(2)若
,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/35894a0973aac742a253bb725fda33b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edb57d84f9bbcb3e30d4ce7e2e1e8604.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f6fe82b68a55c00b62cf384ac25d1f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3daedeb49c015ce934ea2b9691689312.png)
您最近一年使用:0次
2020·全国·模拟预测
解题方法
8 . 如图,在正方形
中,
,
分别是
,
上的点,且满足
,
.
![](https://img.xkw.com/dksih/QBM/2021/1/5/2629676682059776/2629765685346304/STEM/00fe7928ca41464eb0f6dd5283b8469a.png?resizew=178)
(1)求
的长;
(2)求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e038d518b2c2af2c24804e8c0bfd096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4cedc6911d02394383004ef17213ebe.png)
![](https://img.xkw.com/dksih/QBM/2021/1/5/2629676682059776/2629765685346304/STEM/00fe7928ca41464eb0f6dd5283b8469a.png?resizew=178)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ff39c7aa648afd1080206c8080ff79e.png)
您最近一年使用:0次
2020·全国·模拟预测
9 . 在①
,②
,③
这三个条件中任选一个,补充在下面的问题中,并求解问题.在
中,内角
的对边分别为
,且
,__________,求
面积的最大值.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/426b424c9e268e30f192ca293c46817e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebafadf9e34e9932e9f50f204c4ad073.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8a2bd7a64d8b2be3180064aa4cf1f64.png)
![](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/b71812e0762c0aaffb51cfef66156567.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
10 . 在①
,②
,③
.这三个条件中任选一个,补充在下面的问题中,并作答.
问题:已知
,
,
分别为
三个内角
,
,
的对边,
,________.
(1)求
;
(2)若
是
边的中点,
,求
的面积.
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/047096fc5b0afd0e1712b6b64485d6b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e246a04a574f14b7fadd7ec7357242f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68362c7761514b21daf31c332c64eec8.png)
问题:已知
![](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/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/03837b3769eda7f0d3804cc5ad4a6d60.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69247bfcb729929d470b3b9f01d6b447.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6a783e5ffcf7a4ea9e531ea76199487.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
2021-01-01更新
|
294次组卷
|
3卷引用:新高考2021届高三考前保温热身模拟卷数学试题(二)