1 . 已知
,且
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bda318adf65c6b6fd45f651365f52346.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9330f5a1902fe99fc5edd744fbe9146.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb42b1b91ab03ab59cd22b6c9e6f223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/994d6e7f47b3b98aa848c05d0af8f65e.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2021-02-06更新
|
328次组卷
|
4卷引用:贵州省龙里县九八五实验学校2020-2021学年高一上学期期末质量检测数学试题
解题方法
2 . 在
中,角
,
,
所对的边分别为
,
,
.已知
,
,则
面积的最大值是( ).
![](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/20ba04f8b8c6fb17dd5f9aae410725d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2021-02-06更新
|
330次组卷
|
5卷引用:贵州省龙里县九八五实验学校2020-2021学年高二上学期期末质量检测数学(文)试题
解题方法
3 . 已知
内角
,
,
所对的边分别为
,
,
,若
,则
的形状一定是( )
![](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/e8fcdbfed151bad84bbcaeea1c97d75d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
A.等腰三角形 | B.直角三角形 | C.钝角三角形 | D.锐角三角形 |
您最近一年使用:0次
名校
4 . 已知
是第二象限角,且
,
是第一象限角,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fbe2212c10c3da621f550e8c6409bd7.png)
(1)求
,
;
(2)若对于任意的角
都有
成立,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a92b5f617460604b942a9c302b3a41ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fbe2212c10c3da621f550e8c6409bd7.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b4179e1ab8705cf19ea7aaf48888843.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eacde1c42151734fdc60f3001b590de.png)
(2)若对于任意的角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80ada15d54503b8770cdf8d73f7bb2d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f372b43f190f84b3bbdf423102fd624.png)
您最近一年使用:0次
5 . 设△ABC的内角A,B,C的对边分别为a,b,c,
,且B为钝角.
(1)证明:
;
(2)再从下列三个条件中选出两个条件,求△ABC的面积.①
,②
,③
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e008862231c1f2e9b6197ea3c5b629aa.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfd2d90ed8b5f265bb5b0a8c84b4b743.png)
(2)再从下列三个条件中选出两个条件,求△ABC的面积.①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65397f11ea8af736f38debadf420c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42190fdb24c6e918e06eb4a2ebf8856f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b326dc38d92806c8911b9f9e1a3f323e.png)
您最近一年使用:0次
2022-11-07更新
|
172次组卷
|
2卷引用:贵州省黔南州2023届高三上学期10月质量监测数学(理)试题
名校
解题方法
6 . 某实验室一天的温度(单位:℃)随时间t (单位:h)的变化近似满足函数关系:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e09b26889af6ce2e28d98b90ff753145.png)
(1)求实验室这一天的最大温差;
(2)若要求实验室温度不高于11℃,则在哪段时间实验室需要降温?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e09b26889af6ce2e28d98b90ff753145.png)
(1)求实验室这一天的最大温差;
(2)若要求实验室温度不高于11℃,则在哪段时间实验室需要降温?
您最近一年使用:0次
2020-08-12更新
|
356次组卷
|
11卷引用:【全国百强校】贵州省黔南市都匀第一中学2018-2019学年高一上学期期末考试数学试题
【全国百强校】贵州省黔南市都匀第一中学2018-2019学年高一上学期期末考试数学试题人教A版 全能练习 必修4 第一章 第六节 1.6 三角函数模型的简单应用江苏省苏州市相城区陆慕高级中学2019-2020学年高一上学期12月月考数学试题江苏省苏州市震泽中学2019-2020学年高一(普通改班)上学期第二次月考数学试题人教A版(2019) 必修第一册 逆袭之路 第五章 5.7 三角函数的应用【新教材精创】7.4+三角函数应用+学案-苏教版高中数学必修第一册陕西省西安市铁一中学2019-2020学年高一上学期12月月考数学试题(已下线)5.7 三角函数的应用(精练)-2020-2021学年一隅三反系列之高一数学新教材必修第一册(人教A版)安徽省蚌埠市田家炳中学2020-2021学年高一下学期4月月考数学试题(已下线)7.4三角函数的应用(备作业)-【上好课】2021-2022学年高一数学同步备课系列(苏教版2019必修第一册)第一章《三角函数》 达标检测(一)-【培优题】2020-2021学年高一数学北师大2019版第二册
名校
7 . 已知
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc903c19f7b3b0aa58cdb0cdb7b062a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ab9657511fc5953a935b8029ad4a190.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc903c19f7b3b0aa58cdb0cdb7b062a0.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
解题方法
8 . 如图.已知
是半径为
,圆心角为
的扇形,D是弧
上的动点.过点D作
,垂足为A.某公司欲建一个风景区,该风景区由
和正方形
构成,则该风景区面积的最大值为___________
'.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/161ea3eaa2e28747507c1c0e4a7b39f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1890f0b4e81634bb7e013412698640f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d88591679796c52024d11c4de641bdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f368b245e95250069a5b002fc77133.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/372629a8666de1e9bac3e7daadcac7b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa40703e74a4a7bc0e86c75f93fb8ed8.png)
![](https://img.xkw.com/dksih/QBM/2021/3/17/2679741875871744/2684950403219456/STEM/0b302e918fc74cb898317c8f0414c26f.png?resizew=136)
您最近一年使用:0次
解题方法
9 . 已知函数
,则下列说法中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e6fa508bf1f6ad0a1ced347876a3858.png)
A.函数![]() ![]() |
B.函数![]() ![]() |
C.函数![]() |
D.函数![]() ![]() |
您最近一年使用:0次
2020-03-05更新
|
334次组卷
|
2卷引用:贵州省黔南州2018-2019学年高二上学期期末考试数学(文)试题
名校
10 . 如图,在
中,
是
边上一点,已知
,
,
.
![](https://img.xkw.com/dksih/QBM/2021/4/22/2705561437741056/2806355700523008/STEM/4bca25df36c8434d9ee3624824605179.png?resizew=266)
(1)求
的长;
(2)若
,求
.
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d5a2cd05e4476fc72271e8fdb59a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dce3b0e853ec2895b3888dbfa41140c.png)
![](https://img.xkw.com/dksih/QBM/2021/4/22/2705561437741056/2806355700523008/STEM/4bca25df36c8434d9ee3624824605179.png?resizew=266)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce24bb3fd41549b12524dfbe736c0a19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77b0ee4d3014800b3664cec93be49a9f.png)
您最近一年使用:0次
2021-09-12更新
|
232次组卷
|
2卷引用:贵州省瓮安第二中学2020-2021学年高一下学期第一次月考数学试题