1 . 已知
,
,
分别为
三个内角
,
,
的对边,且
.
(1)求
;
(2)已知
,______,且
为
的中点,求线段
的长.
在①
周长为6;②
面积为
这两个条件中任选一个填在上面横线上,作为条件,并解决该问题.
(注:如果选择多个条件分别解答,则按第一个解答计分.)
![](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/4685455b5c118d7072628ad99ab47042.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
在①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
(注:如果选择多个条件分别解答,则按第一个解答计分.)
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4卷引用:江苏省南通市2022-2023学年高一下学期4月期中数学试题
江苏省南通市2022-2023学年高一下学期4月期中数学试题(已下线)模块三 专题10(劣构题)拔高能力练(苏教版)江苏省南通市海安市实验中学2022-2023学年高一下学期期中数学试题广西南宁市隆安县隆安中学2022-2023学年高一下学期数学期末复习预测试题
解题方法
2 . 已知锐角三角形ABC中,角A,B,C所对的边分别为a,b,c,设
的面积为S,且
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c17fcbf76622a08e9b91656cb4e26cf1.png)
______ ,
的取值范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2a0e1e5cfdc8340fa71a83dcb8c3379.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c17fcbf76622a08e9b91656cb4e26cf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc8587ffb5741cc6bbca494717cbe967.png)
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2卷引用:江苏省南通市2022-2023学年高一下学期4月期中数学试题
名校
3 . 已知
中,角A,B,C所对的边分别为a,b,c,下列条件中,能使
的形状唯一确定的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.![]() | B.![]() ![]() ![]() |
C.![]() | D.![]() ![]() |
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5卷引用:江苏省南通市2022-2023学年高一下学期4月期中数学试题
4 . 某公司第1年年初向银行贷款1000万元投资项目,贷款按复利计算,年利率为10%,约定一次性还款.贷款一年后每年年初该项目产生利润300万元,利润随即存入银行,存款利息按复利计算,年利率也为10%,则到第
年年初该项目总收益为______ 万元,到第______ 年的年初,可以一次性还清贷款.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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5 . 已知等差数列
的前
项和为
,且
,则
( )
![](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/3f86a8746a583f411fb73c6334eb27b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc4e70b360f988fdbd92300ab22c4613.png)
A.12 | B.14 | C.16 | D.18 |
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6 . 我国油纸伞的制作工艺巧妙.如图,伞不管是张开还是收拢,伞柄AP始终平分同一平面内两条伞骨所成的
,且
,从而保证伞圈D能够沿着伞柄滑动.伞完全收拢时,伞圈D滑到
的位置,且
、
、
三点共线,
,
为
的中点,当伞从完全张开到完全收拢,伞圈D沿着伞柄向下滑动的距离为24cm.
(1)当伞完全张开时,求
的余弦值;
(2)如图(2),当
时,在线段
、
上分别取点
、
,使得
,连接
交
于点
,若
的面积为
面积的
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b3bd5e6bc2a0a277d279bb01af9584.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/e5b3bd5e6bc2a0a277d279bb01af9584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4703a3f076f5e088dfa809aef5d48751.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9b123ae31090740589ba27a846620b5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/22/70c3092d-71cb-4db9-be03-12b8126da1db.png?resizew=176)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/22/fd9fa1b1-6614-4689-98d9-73bbd52499e7.png?resizew=263)
(1)当伞完全张开时,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
(2)如图(2),当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1371fe98a65d8ebd840c8d98346b6d15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dc7242399bf07ea3b7c43a74bda3b35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98013a5042685a1db94249e70c62c09a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/295f5c22f2b562bce2f502dd66f31752.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93f61541933c77ff593ceeb349eafe89.png)
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名校
解题方法
7 . 已知锐角△ABC内角A、B、C的对边分别为a、b、c,且a(tanA+tanC)=2b·tanA.
(1)求C的大小;
(2)若△ABC的面积为
,求a的取值范围.
(1)求C的大小;
(2)若△ABC的面积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
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2卷引用:江苏省淮安、宿迁七校2022-2023学年高一下学期期中联考数学试题
8 . 在△
中,已知内角A、B、C所对的边分别为a、b、c,且
.
(1)式子
的值为是否为定值?如果是,请求出这个定值;如果不是,请说明理由;
(2)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c8a5c4de714c0f0d02b9f18814f0ffe.png)
(1)式子
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/129cea9026db4c949462f631ceb985c4.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01bf5065465ea27a87832d0353a0a3fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5201fc26d013f6fb889933c0e32f5c53.png)
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名校
解题方法
9 . 已知
中,
,
,
,则边
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dcb0f76e6b581910aa635c8a7b5299c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eca933cc87d5dc0750544ff45f87707.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
A.2 | B.3 | C.2+![]() | D.![]() |
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3卷引用:江苏省淮安、宿迁七校2022-2023学年高一下学期期中联考数学试题
10 . 海面上有相距
的A,B两个小岛,从A岛望C岛和B岛成
的视角,从B岛望C岛和A岛成
的视角,则B,C间的距离为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0106e58e1e237b72aea6d1878c78668.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a4c9b697e3df2b5469b71d3b5e47a2.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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