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1 . 在
中,
是角
的平分线,
,且
,则
的面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e39d0f4ab0ff34e779f360cb9d8e16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2021-11-09更新
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347次组卷
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2卷引用:河南省湘豫名校联盟2021-2022学年高三上学期期中考试(文科)数学试题
2 . 已知
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abc36f1850fb5308496d5a44dcb1bf41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06a2b8dae45cd30a752aedb1ca66c30a.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2021-10-24更新
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2卷引用:河南省洛阳市2021-2022学年高三上学期期中理科数学试题
12-13高二上·上海·期末
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解题方法
3 . 已知圆O的半径为1,
,
为该圆的两条切线,A、B为两切点,那么
的最小值是___________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30513ea48bc1ef3ae78adac83d894f14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a33e5d0dbdd0f15854f0d7dd8b53058.png)
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2021-09-25更新
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868次组卷
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8卷引用:河南省洛阳市2020-2021学年高一下学期期中考试数学(理科)试题
河南省洛阳市2020-2021学年高一下学期期中考试数学(理科)试题2015-2016学年四川省成都七中实验学校高二上学期期中文科数学试卷(已下线)2011-2012学年上海市重点中学高二上学期期末考试数学(已下线)2014届江苏盐城第一中学高三第二学期期初检测理科数学试卷高中数学解题兵法 第二十一讲 数形结合解平面向量问题(已下线)专题4平面向量综合闯关 (基础版)(已下线)FHsx1225yl078四川省成都石室中学2023-2024学年高一下学期5月月考数学试题
4 . 已知
,
,则
的值可能在下列哪个区间内( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/900811e98359e4527e565bde8a12d380.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eedd74bac783d982c2f7deaede02e4af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a09ffc1644c7029219b88232145abbdf.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2021-08-25更新
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178次组卷
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2卷引用:河南省焦作市普通高中2020-2021学年高一下学期期中考试数学试题
5 . 《九章算术》是我国古代数学成就的杰出代表,是《算经十书》中最重要的一种,其中《方田》章有弧田面积计算问题,计算术曰:以弦乘矢,矢又自乘,并之,二而一.其大意是,弧田面积的计算公式为:弧田面积
(弦×矢+矢×矢).弧田是由圆弧(简称为弧田弧)和以圆弧的端点为端点的线段(简称为弧田弦)围成的平面图形,公式中“弦”指的是弧田弦的长,“矢”等于弧田弧所在圆的半径与圆心到弧田弦的距离之差.现有一弧田,其弦长
等于
,其弧所在圆为圆O,若用上述弧田面积计算公式算得该弧田的面积为
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a50a39604477d1d9326eb455cda2e838.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d568856b3349a45f8b95d4a6454a858.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/673382fe690e68ce72f156e966a7c103.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bead945284ae967c8c526c9a73a26e6.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2021-08-16更新
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347次组卷
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2卷引用:河南省郑州市八校2020-2021学年高一下学期期中联考数学试题
解题方法
6 . 已知
,
,
是
的三个内角,向量
,
,且
.
(1)求角
;
(2)若
,求
.
![](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/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fef44d747b7eec31a9fa6daaae44c066.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19ee50c61d3794c3a4e285834e3e6e55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7cb5138a03b19266f82223899a614f7.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/665ed42af06724791c281e269e1e8a13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/721e29b775e696045f44a4b1e7f74ef2.png)
您最近一年使用:0次
7 . 如图,在
中,
,
分别是
,
的平分线,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/aaa1cef0-03f7-4795-af74-53ff3b57fcbd.png?resizew=211)
(1)求
;
(2)若
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed28c89659515a974aaafbee17652ba1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/aaa1cef0-03f7-4795-af74-53ff3b57fcbd.png?resizew=211)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5201fc26d013f6fb889933c0e32f5c53.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0c809e74565082f1cfbe142d080c73d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d66c03d4ca06819a6ce7fc8ea6de0f0.png)
您最近一年使用:0次
解题方法
8 .
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af7d7a9be72927027a1ce78fda9dbb6a.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f432aaadf5e787e943abd4211681cf84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af7d7a9be72927027a1ce78fda9dbb6a.png)
您最近一年使用:0次
名校
9 . 已知
,
,
,
.
(1)求
的值;
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c65b6c42393fae47c51101713167ff71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a5836e98ad2e1f12459849b856e7341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fa8063fb6f7ae19a2d79813590e4b0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/256b941c36c2105926c18ece3b7e0d13.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b18576e4c3193432b246d2daefc8103.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8dc4c63a548b91061528aa11058de75.png)
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2021-07-10更新
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3卷引用:河南省商开大联考2020-2021学年高一下学期期中考试数学试题
10 . 已知
,且
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca8f77412df80e314ee1e5efd6a4b52f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4fb216bccf2044110b14f030b494268.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38dd8aad9cfb5e1fe2a45d80923f1571.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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