1 . 在
中,角A,B,C所对的边分别为a,b,c,且
,
,
.
(1)求C的大小
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f5b763032c085a1e60822d8dc1b3605.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23725094c363fd158166a8698971694c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bf4c55e68427cca325cfbddedcf84eb.png)
(1)求C的大小
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc1a30f965a9e4d7804c3bab0ec49ab8.png)
您最近一年使用:0次
解题方法
2 . 在
中,内角A,B,C所对的边分别为a,b,c,且满足
.
(1)求角A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/3c806a3cc96298e7052b64a77e01cfea.png)
(1)求角A的大小;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8120119749d4bc28067e73fca7d46cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b409809543bae9f5e231a83e515dbbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
21-22高一·全国·课后作业
名校
解题方法
3 . 已知
,
都是锐角,
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9bc052a11cf1a01445992672dde2836.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5be57000a1efb86910cce1e4ac6b21a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b63e88d9ce4afb1766093727c466c577.png)
A.1 | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2022-01-02更新
|
2051次组卷
|
8卷引用:贵州省六盘水红桥学校2021-2022学年高二上学期第一次月考数学试题
贵州省六盘水红桥学校2021-2022学年高二上学期第一次月考数学试题(已下线)5.5 三角恒等变换(精练)-2021-2022学年高一数学一隅三反系列(人教A版2019必修第一册)(已下线)解密07 三角函数恒等变换(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)(已下线)解密07 三角函数恒等变换(讲义)-【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)(已下线)专题6.5 必修第一册期末考试总复习检测1(易)-【满分计划】2021-2022学年高一数学阶段性复习测试卷(人教A版2019必修第一册)山东省临沂第一中学2021-2022学年高一下学期第一次教学检测(线上)数学试题江西省宜春市万载中学2021-2022学年高一(普通班)下学期期中考数学试题山东省菏泽市单县第二中学2021-2022学年高一上学期期末数学试题
解题方法
4 . 已知
是定义在
上的奇函数,当
时,
,则在
时,
的解析式是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e2e79843faf62dde86bf858d1e0569.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31024edd777899692f8b44aa1a3122d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e541ea2f855f981c96207070683d388.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
您最近一年使用:0次
解题方法
5 . 某轮船航行过程中每小时的燃料费与其速度的平方成正比.已知当速度为
千米
时,燃料费为
元
时,其他与速度无关的费用每小时
元.
(1)求轮船的速度为多少时,每千米航程成本最低?
(2)若轮船限速不超过
千米
时,求每千米航程的最低成本.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07ae0b4264da6a8812454ffd2f20d94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4333bb203d02814c146ed587b69ea69d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07ae0b4264da6a8812454ffd2f20d94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4333bb203d02814c146ed587b69ea69d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2f7530034abc91d11bc847602eaf5bc.png)
(1)求轮船的速度为多少时,每千米航程成本最低?
(2)若轮船限速不超过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b7f27ebcef70a3ebbbe8d2e53ea0896.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4333bb203d02814c146ed587b69ea69d.png)
您最近一年使用:0次
解题方法
6 . 若函数
是指数函数
(1)求
,
的值;
(2)求解不等式![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c98609627aa12f359090605d9c32b6.png)
(3)证明![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c20e56d9e08b8e59f5053e353933dc5d.png)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06fbb7738455e88a9fe807a56d65b106.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)求解不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c98609627aa12f359090605d9c32b6.png)
(3)证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c20e56d9e08b8e59f5053e353933dc5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52a6f97682685e4d6135ce4431324524.png)
您最近一年使用:0次
解题方法
7 . 不透明的袋子中有大小相同的
个白球,
个红球,
个黑球,从中一次性摸出
个球,则
种颜色的球都被摸出的不同的摸法种数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2021-12-26更新
|
499次组卷
|
3卷引用:贵州省名校联盟2022届高三12月联考数学(理)试题
8 . 如图,在四棱锥
中,已知
,
,
,
,且
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/310ac3e8-da08-413b-bc84-19278681eb4b.png?resizew=230)
(1)证明:平面
平面
.
(2)若
是
上一点,且
平面
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10df84d553a8826a7ce9bff4bf0d95b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdb2dd10731b99c0f4f89ee957f8a239.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27db558e8db4c957654c8e5cecd2d2dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f757a971a728eb73b9ea66a6e18c22b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/310ac3e8-da08-413b-bc84-19278681eb4b.png?resizew=230)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/982d01f052709b72afeaf1015fc7acc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041434f0c90fb3cdd685b8eb1c2b4b26.png)
您最近一年使用:0次
2021-12-25更新
|
479次组卷
|
2卷引用:贵州省名校联盟2022届高三12月联考数学(文)试题
解题方法
9 .
的内角
,
,
的对边分别为
,
,
,且满足
,
.
(1)求角
的大小;
(2)求
周长的取值范围.
![](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/e65397f11ea8af736f38debadf420c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84e9331a0aeb6be20548b99981a93c75.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
解题方法
10 . 设复数
,
满足
,
,则
的最大值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af68f652b4c13657ffddf3c9e7eb262b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa224ed9be8766a4d0b5138bd57de0f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b43041d4c5a877739fc38e1529217ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a71d95f0a0cb3098c5c29aa8bb15b4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b87e8cdf5716e8c4aa29de4d4bd6d7b6.png)
A.2 | B.![]() | C.4 | D.![]() |
您最近一年使用:0次
2021-12-25更新
|
684次组卷
|
5卷引用:贵州省名校联盟2022届高三12月联考数学(文)试题
贵州省名校联盟2022届高三12月联考数学(文)试题(已下线)第11讲 复数的四则运算-【寒假自学课】2022年高一数学寒假精品课(人教A版2019必修第二册)(已下线)第7.2讲 复数的四则运算-2021-2022学年高一数学链接教材精准变式练(人教A版2019必修第二册)(已下线)第05讲 复数的四则运算(核心考点讲与练)-2021-2022学年高一数学考试满分全攻略(人教A版2019必修第二册)(已下线)专题11+复数的四则运算(2)-《重难点题型·高分突破》(人教A版2019必修第二册)