2020·全国·模拟预测
名校
解题方法
1 . 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
|
1284次组卷
|
4卷引用: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
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(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
名校
解题方法
2 .
中,内角
、
、
的对边分别为
、
、
,已知
.
(1)求角
的大小;
(2)若
,
,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/855d619c9cee1407eeee112444e24dbb.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6129fbf40a950fc8c516f0abaab21957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
2020-12-05更新
|
608次组卷
|
3卷引用:黑龙江省大庆中学2020-2021学年高三上学期期中考试数学(文)试题
名校
解题方法
3 . 在
中,角
的对边分别为
,若
,则
的形状为( )
![](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/dc9af3d3b18d52c3bf952aead17a379e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.直角三角形 | B.等腰三角形 | C.等腰直角三角形 | D.等边三角形 |
您最近一年使用:0次
2020-12-04更新
|
745次组卷
|
3卷引用:黑龙江省鹤岗一中2021届高三(上)期中数学(理科)试题
黑龙江省鹤岗一中2021届高三(上)期中数学(理科)试题湖南省部分重点高中2020-2021学年高二上学期期中联考数学试题(已下线)热点05 三角函数与解三角形-2021年高考数学(理)【热点·重点·难点】专练
名校
4 . 计算![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54b94d4f348a34b4da6a4a9e8a23aacc.png)
_____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54b94d4f348a34b4da6a4a9e8a23aacc.png)
您最近一年使用:0次
2020-11-12更新
|
1107次组卷
|
3卷引用:黑龙江省哈尔滨市第九中学校2023-2024学年高三上学期10月月考数学试题
解题方法
5 . 将函数
的图像向左平移
个单位长度,得函数
的图像,若
在
内只有两个最值(即最大值和最小值),则
的最大正整数值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c41ab1ddb9afd3cffb5076afca8e2edb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a161c9dcc844a6e7f7600042baaab00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f00f2f6ab162f9333ec55db195d663b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
A.6 | B.5 | C.4 | D.3 |
您最近一年使用:0次
名校
6 . 设函数
,
.
(1)求函数
的周期和值域;
(2)设
的内角A,B,C的对边分别为a,b,c,若
且
,求C的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3583a040e1de03972c2e76652f6c8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/315116290dce11165908b4f3292d94c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a308194554e3eda8ae76888781f2c6d5.png)
您最近一年使用:0次
名校
解题方法
7 . 在
中,角
,
,
的对边分别为
,
,
,且
.
(1)求角
的大小;
(2)若
,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.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/b2e5387867c44fd8b2add4443c51f623.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6de1d395e6c48c0676a1488a299479d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39372e70f5465f8cf0c5ebf7653f0e68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
8 . 已知
.
(1)求函数
的单调区间;
(2)求函数
在区间
上的最值及相应的
值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee4de1209a2d8964cfcb6f4262701c0d.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44d51992c05a557cf6058664f1f8961e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
您最近一年使用:0次
2020-09-04更新
|
471次组卷
|
2卷引用:黑龙江省哈尔滨师范大学附属中学2021-2022学年高一下学期开学考试数学试题
名校
解题方法
9 . 已知△ABC中,a,b,c分别是角A,B,C的对边,且满足C=
,
,那么△ABC的形状一定是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d88591679796c52024d11c4de641bdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2681f0d1732bcaa8d6362fbd1fa6caa2.png)
A.钝角三角形 | B.直角三角形 | C.等边三角形 | D.无法确定 |
您最近一年使用:0次
2020-07-26更新
|
211次组卷
|
2卷引用:黑龙江省齐齐哈尔市2019-2020学年高一(下)期末数学试题
名校
解题方法
10 . 计算
( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/734f401baf0b0efbf64966e08fa50e6d.png)
A.4 | B.![]() | C.![]() | D.2 |
您最近一年使用:0次
2020-07-22更新
|
3609次组卷
|
5卷引用:黑龙江省牡丹江市第二高级中学2023-2024学年高一上学期期末考试数学试题