名校
1 . 已知向量
,函数
,且
图象上一个最高点为
与
最近的一个最低点的坐标为
.
(Ⅰ)求函数
的解析式;
(Ⅱ)设
为常数,判断方程
在区间
上的解的个数;
(Ⅲ)在锐角
中,若
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c1a2ad5e1faf8dc1e4151c76731038c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638929b037d0f63a486aec2c645ccee5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57fce411cd061e4b94e8bb48dd262571.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66eb8705d9da194966ecc7db15f98448.png)
(Ⅰ)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(Ⅱ)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c342d52fc26cc550a45b80756903bee6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da0b1b34a0cb69bd9e0a4622b6352968.png)
(Ⅲ)在锐角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a7d9349759c3fdecae140760707ff02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3292a7444b7e76515cee05ffe1eea50.png)
您最近一年使用:0次
2017-07-21更新
|
3721次组卷
|
6卷引用:辽宁省沈阳市第一七〇中学2019-2020学年高一联合体期末考试数学试卷
2 . 设数列
的前
项和为
,且
.
(1)求数列
的通项公式;
(2)设
,求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ded7a26c0a7681d419a0417cd634bb2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d405b6fef136cce09295e70354d1009.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/216876de04325fd250c38c485cbc34b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
2017-07-21更新
|
824次组卷
|
3卷引用:辽宁省大连市旅顺口区2018-2019学年高一下学期期末数学(理)试题
辽宁省大连市旅顺口区2018-2019学年高一下学期期末数学(理)试题黑龙江省双鸭山市第一中学2016-2017学年高一下学期期末考试数学(理)试题(已下线)卷07-备战2020年新高考数学自学检测黄金10卷-《2020年新高考政策解读与配套资源》
3 . 如图,两条公路AP与AQ夹角A为钝角,其正弦值是
.甲乙两人从A点出发沿着两条公路进行搜救工作,甲沿着公路AP方向,乙沿着公路AQ方向.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/17/cbbd55a2-4518-48d9-b182-b56859b632c8.png?resizew=197)
(1)当甲前进
的时候到达P处,同时乙到达Q处,通讯测得甲乙两人相距
,求乙在此时前进的距离AQ;
(2)甲在
处原地未动,乙回头往A方向行走至M点收到甲发出的信号,此时M点看P、Q两点的张角为
(张角为
QMP),求甲乙两人相距的距离MP的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eac97e6740365c85ad857aff85cefbe5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/17/cbbd55a2-4518-48d9-b182-b56859b632c8.png?resizew=197)
(1)当甲前进
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0017113f394bc42d821adeb220857cdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/553e8a83e9403732a509e71bcfd71a2b.png)
(2)甲在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0017113f394bc42d821adeb220857cdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3b199d124fb9a5bc8438c9884f04534.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/665ffcdb7c57534dc184cc840471f2f5.png)
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解题方法
4 . 如图,在
中,角A,B,C所对的边分别为a,b,c,且
.
(1)求角A的大小;
(2)若
是
的角平分线,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1ea2e2f17a0f42f9f2eaab41eb8f90b.png)
(1)求角A的大小;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ccce53d9b825768f9c781b697828fe6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
您最近一年使用:0次
名校
解题方法
5 . 在△ABC中,角A,B,C所对的边分别为a,b,c,且a+b+c=8.
(1)若a=2,b=,求cosC的值;
(2)若sinAcos2+sinB·cos2
=2sinC,且△ABC的面积S=
sinC,求a和b的值.
您最近一年使用:0次
2018-01-10更新
|
2320次组卷
|
13卷引用:辽宁省沈阳铁路实验中学2019-2020学年高一6月月考数学试题
辽宁省沈阳铁路实验中学2019-2020学年高一6月月考数学试题2014-2015学年重庆市万州二中高一4月月考文科数学试卷2016届宁夏六盘山高级中学高三第一次模拟考试文科数学试卷2015-2016学年重庆市八中高二下期中理科数学试卷2017届河北沧州一中高三11月月考数学(文)试卷2017-2018学年高中数学苏教版必修五:第一章 章末过关检测卷2018年春高考数学(理)二轮专题复习训练:专题二 三角函数与平面向量、解三角形江西省南昌市第二中学2018届高三上学期第四次考试数学(理)试题人教B版(2019) 必修第四册 过关斩将 第九章 解三角形 本章达标检测陕西省西安中学2020-2021学年高二(实验班)上学期第一次月考理科数学试题云南省昭通市第一中学2022-2023学年高一下学期3月月考数学试题天津市西青区杨柳青第一中学2023届高考全真模拟检测数学试题(已下线)专题20 三角函数及解三角形解答题(文科)-1
名校
6 . 求函数
的最大值,以及此时x的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a57a49680743daac0f507338b01aae19.png)
您最近一年使用:0次
2017-07-05更新
|
540次组卷
|
6卷引用:辽宁省沈阳市城郊市重点联合体2019-2020学年高二上学期期中数学(理)试题
名校
解题方法
7 . 已知正项等比数列
的前
项和为
,且
,
.
(1)求数列
的通项公式;
(2)设
,求数列
的前
项和为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5e6ce8f228c666c0fb5073bb647453b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac295d9621173c2ea9b070ab72ce2d28.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6df1e8c28789ee186157ec527a7f5199.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
2017-07-01更新
|
714次组卷
|
4卷引用:辽宁省普兰店市第一中学2018-2019学年高二上学期期中考试数学试题
名校
8 . 已知等差数列{an}中,a2=5,S5=40.等比数列{bn}中,b1=3,b4=81,
(1)求{an}和{bn}的通项公式
(2)令cn=an•bn,求数列{cn}的前n项和Tn.
您最近一年使用:0次
2017-06-29更新
|
703次组卷
|
2卷引用:辽宁省实验中学2018届高三上学期期中考试数学(理)试题
名校
解题方法
9 . 已知函数
在区间
上单调递增,在区间
上单调递减.如图,四边形
中,
,
,
为
的内角
,
,
的对边,且满足
.
![](https://img.xkw.com/dksih/QBM/2017/3/30/1654879035613184/1655080581783552/STEM/3d89875fc36c4bed90cdc0292f4c0375.png?resizew=151)
(1)证明:
;
(2)若
,设
,
,
,求四边形
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b6bc5be1f6650405734febefd2d25a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3629bd80b1fc9a448df6d593bc601268.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ebafb5475b6d5d7f56b584292e4a486.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ea16ceca816f7d3d50650af141baf42.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/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/1ce0c5748b388714acf9319ae1d12741.png)
![](https://img.xkw.com/dksih/QBM/2017/3/30/1654879035613184/1655080581783552/STEM/3d89875fc36c4bed90cdc0292f4c0375.png?resizew=151)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942245aece46d6fa4a771afe4ff05929.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b05d3b8f5c9df891ef6fbcaf12f43207.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb7e00f8bacce4d649b535449f04568c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c00e55fd3508349b15f987f6b9655b31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5811e450dcff0e190c3d7378c08797c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ea16ceca816f7d3d50650af141baf42.png)
您最近一年使用:0次
2017-03-30更新
|
1058次组卷
|
3卷引用:辽宁省庄河市高级中学、沈阳市第二十中学2018届高三上学期第一次联考数学(理)试题
解题方法
10 . 设
是数列
的前
项和,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3ddd6d99ad32dd7fdb1797d8cf94786.png)
.
(1)求数列
的通项公式;
(2)设![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c64a556380742743746b028dcb11dcf1.png)
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3ddd6d99ad32dd7fdb1797d8cf94786.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e5e07bf129b073f37b553fbca100172.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c64a556380742743746b028dcb11dcf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e5e07bf129b073f37b553fbca100172.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c450e037b83fd7ce8790695ce81554.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e5e07bf129b073f37b553fbca100172.png)
您最近一年使用:0次