名校
1 . 在
中,已知
,
,
,
为线段
上的点,且
,则
的最大值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db4fa15a2aa386390f88eaf4bf7e3188.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/386eb659fda09b15da83566e79f20e3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ef98fdbaa33fc752c802e833f8b08a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a941e5b42ba7384676155d34456019d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f29d5f376c75c41ae6af0c8a8565449.png)
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2017-06-22更新
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11卷引用:江苏省南京市高淳区2016-2017学年高二下期末考试数学试题
江苏省南京市高淳区2016-2017学年高二下期末考试数学试题黑龙江省大庆实验中学2017-2018学年高一4月月考数学(理)试题北京市第171中学2019-2020学年高三10月月考数学试题黑龙江省大庆实验中学2020届高三综合训练(五)数学(理科)试题(已下线)专题12 基本不等式的应用-2020年高考数学母题题源解密(江苏专版)四川省雅安市2019-2020学年高一下学期期末考试数学试题安徽省卓越县中联盟2020-2021学年高二上学期期中联考数学(理)试题上海市金山中学2021届高三上学期期中数学试题江苏省常州市前黄高级中学2020-2021学年高三上学期期中适应性考试数学试题(已下线)考向11 正弦、余弦定理和解斜三角形-备战2022年高考数学一轮复习考点微专题(上海专用)北京市第一七一中学2021届高三上学期10月月考数学试题
名校
2 . 在
中,已知边
所对的角分别为
,若
,则
_________________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37ae35117201864f8c34ede2f1c429c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e33e8045277a342dbbaff481815bd532.png)
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2017-06-02更新
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6038次组卷
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6卷引用:江苏省南京市南京师范大学附属中学2017届高三考前模拟考试数学试题
江苏省南京市南京师范大学附属中学2017届高三考前模拟考试数学试题江苏省苏州市2020届高三下学期5月二模数学试题(已下线)考点24 正弦定理、余弦定理(考点专练)-备战2021年新高考数学一轮复习考点微专题(已下线)2022年高考考前20天终极冲刺攻略(三)【理科数学】(5月31日)(已下线)专题14 解三角形图形类问题-3(已下线)重难点突破02 解三角形图形类问题(十大题型)-2
3 . (原创)在非直角
中,
为
上的中点,且
,
为边
上一点,
,
,则
的面积的最大值为__________ .(其中
表示
的面积)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.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/82b8f94d6fd005534d064ddacf8800b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcbd3835acdb0c946b5fc3c5a3f3b0f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60634341a9603e24b2bbc6960abe3d31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58195e8ee6f342c1641d9e88ff986f56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
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2017-05-27更新
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3938次组卷
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2卷引用:重庆市第一中学2016-2017学年高一下学期期中考试数学试题
名校
4 . 已知
的内角
的对边分别为
,若
,则
的取值范围为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38335830b93ac4d99c28a8e209eecb3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7f5573b30734d65648f61c0a94c98de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a2264c134952d41fb9bcb90e6c72c83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cda8c50fa9e1d758e5d051eac78010ef.png)
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2017-04-18更新
|
7571次组卷
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10卷引用:2017届江西省临川实验学校高三第一次模拟考试数学(文)试卷
2017届江西省临川实验学校高三第一次模拟考试数学(文)试卷天津市耀华中学2017届高三第一次校模拟考试数学(文)试题(已下线)黄金30题系列 高三年级数学江苏版 小题易丢分(已下线)【全国百强校】河北省衡水中学2019届高三下学期三模试卷数学(理科)试题湖南省长沙市明德中学2019-2020学年高三上学期11月第五次月考文科数学试题河北省衡水中学2019-2020学年高三下学期七调数学(理)试题海南省海南中学2021届高三上学期第三次月考数学试题吉林省白城市第一中学2021届高三五模数学(文)试题(已下线)专题4-3 正余弦定理与解三角形小题归类-3(已下线)专题3-3解三角形压轴综合小题-2
5 . 已知抛物线的焦点
到准线
的距离为
,点
与
在
的两侧,
且
,
是抛物线上的一点,
垂直
于点
且
,
分别交
,
于点
,则
与
的外接圆半径之比为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61df3af35740b12c504ec1f2341cad03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/697a0ed63a0eaf8253b7db2c34066c0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b02c2f59ee2b4096af5351b99660aade.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b285934db0cd25f729d8eb2ab4b8524.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8129a90e6874cdc7c23ca4784aa9da8a.png)
A.![]() | B.![]() | C.![]() | D.2 |
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2017-04-11更新
|
718次组卷
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3卷引用:2017届福建省高三4月单科质量检测数学理试卷
名校
解题方法
6 . 把平面图形
上的所有点在一个平面上的射影构成的图形
叫做图形
在这个平面上的射影.如图,在三棱锥
中,
,
,
,
,
,将围成三棱锥的四个三角形的面积从小到大依次记为
,
,
,
,设面积为
的三角形所在的平面为
,则面积为
的三角形在平面
上的射影的面积是
![](https://img.xkw.com/dksih/QBM/2017/3/28/1653753087377408/1656596902756352/STEM/07c1669bb07b4feb900e77cb2c3a00f2.png?resizew=286)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1da895d8bd043625a0839128252130d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e7796caec20ab20a46b31f36a188392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73cab28475a885ff0b5b5d947d65b5ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a8739cc8fc1570400f30f5af109a025.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a1100f8c8bd07c7dfc3c29991acf00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca201616362528f3615de6edb2317848.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b56d35b0e69e306a453c5226899c71c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d43eb0b274e00cbbc4a210da4165042.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/530f5b63e797195906285c0c03eb9276.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83c2d5971afbff8eca1b9aff5f76f710.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e204eeda3cbe67e9e709be5c790b49f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/530f5b63e797195906285c0c03eb9276.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e204eeda3cbe67e9e709be5c790b49f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://img.xkw.com/dksih/QBM/2017/3/28/1653753087377408/1656596902756352/STEM/07c1669bb07b4feb900e77cb2c3a00f2.png?resizew=286)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2017-04-01更新
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1858次组卷
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6卷引用:2017届四川省成都市高三第二次诊断性检测数学理试卷
2017届四川省成都市高三第二次诊断性检测数学理试卷河北省衡水市衡水中学2019届高三下学期六调考试(文)数学试题(已下线)【全国百强校】河北省衡水中学2019届高三下学期六调考试数学(文)试题四川省泸县第五中学2022-2023学年高三上学期第三学月考试数学(理)试题重庆市万州第二高级中学2023届高三三诊数学试题(已下线)专题8.6 空间直线、平面的垂直(一)【八大题型】-举一反三系列
7 . 如图,在平面四边形
中,已知
分别是棱
的中点,若
,设
,则
的最大值是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42c2d86d8daea5e652d99fe1c6bc3f9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a337a934b801730321f67b0e5a0b144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/207551e47a49ebdf447aab8cba24e560.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0048a0a64059e3025b004671a1f1cbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b5e3d14fb4911c1f590fe518df1fa4b.png)
![](https://img.xkw.com/dksih/QBM/2016/11/9/1573135574802432/1573135581093888/STEM/691841b9b8c94b31b31320742ac01ab3.png?resizew=260)
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8 . 一台风中心于某天中午12:00在港口
的正南方向,距该港口
千米的海面
处形成(如图),并以每小时
千米的速度向北偏东
方向上沿直线匀速运动,距台风中心
千米以内的范围将受到台风的影响,请建立适当的坐标系.
![](https://img.xkw.com/dksih/QBM/2016/7/4/1572876590702592/1572876596994048/STEM/e2411f85b0ff4b929d127e4082085db2.png)
(1)当台风中心离港口
距离最近时,求该台风所影响区域的边界曲线方程;
(2)若港口
于当天下午17:00开始受到此台风的影响,(i)求
的值;(ii)求港口
受该台风影响持续时间段的长.
![](https://img.xkw.com/dksih/QBM/2016/7/4/1572876590702592/1572876596994048/STEM/cad9541cbf1c4c4db8e7f7672c319be2.png)
![](https://img.xkw.com/dksih/QBM/2016/7/4/1572876590702592/1572876596994048/STEM/7c56421c378549ddaadc08061dbfb6a2.png)
![](https://img.xkw.com/dksih/QBM/2016/7/4/1572876590702592/1572876596994048/STEM/7d4e72dd473b40aba6d262e698be28c6.png)
![](https://img.xkw.com/dksih/QBM/2016/7/4/1572876590702592/1572876596994048/STEM/a22c0916988d492a8f67c6291d768997.png)
![](https://img.xkw.com/dksih/QBM/2016/7/4/1572876590702592/1572876596994048/STEM/fb5f999fff054b818140d7f103523bad.png)
![](https://img.xkw.com/dksih/QBM/2016/7/4/1572876590702592/1572876596994048/STEM/2003a83b4cf64afca0e62d7df56e9933.png)
![](https://img.xkw.com/dksih/QBM/2016/7/4/1572876590702592/1572876596994048/STEM/e2411f85b0ff4b929d127e4082085db2.png)
(1)当台风中心离港口
![](https://img.xkw.com/dksih/QBM/2016/7/4/1572876590702592/1572876596994048/STEM/cad9541cbf1c4c4db8e7f7672c319be2.png)
(2)若港口
![](https://img.xkw.com/dksih/QBM/2016/7/4/1572876590702592/1572876596994048/STEM/cad9541cbf1c4c4db8e7f7672c319be2.png)
![](https://img.xkw.com/dksih/QBM/2016/7/4/1572876590702592/1572876596994048/STEM/a22c0916988d492a8f67c6291d768997.png)
![](https://img.xkw.com/dksih/QBM/2016/7/4/1572876590702592/1572876596994048/STEM/cad9541cbf1c4c4db8e7f7672c319be2.png)
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9 . 已知
中,角A,B,C所对的边分别是a,b,c,
,且
的周长
,面积
.
(1)求c和
的值;
(2)求
的值.
![](https://img.xkw.com/dksih/QBM/2016/2/15/1572475325956096/1572475331911680/STEM/b752f13b1738426bb3b11565a50e4c10.png)
![](https://img.xkw.com/dksih/QBM/2016/2/15/1572475325956096/1572475331911680/STEM/bc92bf2376134ca69b7dd28e85e4138e.png)
![](https://img.xkw.com/dksih/QBM/2016/2/15/1572475325956096/1572475331911680/STEM/b752f13b1738426bb3b11565a50e4c10.png)
![](https://img.xkw.com/dksih/QBM/2016/2/15/1572475325956096/1572475331911680/STEM/9832dd742f7f41308b5553e834da84b1.png)
![](https://img.xkw.com/dksih/QBM/2016/2/15/1572475325956096/1572475331911680/STEM/d7cedcd6ea0a4f8a94882a0b86911bf0.png)
(1)求c和
![](https://img.xkw.com/dksih/QBM/2016/2/15/1572475325956096/1572475331911680/STEM/d4c5f1c87fba43f391293dd236a26d02.png)
(2)求
![](https://img.xkw.com/dksih/QBM/2016/2/15/1572475325956096/1572475331911680/STEM/bf68fca3120546ce8fcb55d71867ff8a.png)
您最近一年使用:0次
10 . 如图,在凸四边形
中,
为定点,
,
为动点,满足
.
![](https://img.xkw.com/dksih/QBM/2015/5/11/1572100409991168/1572100416020480/STEM/4b86ee0185984d0193c41b7f397f2e4a.png)
(1)写出
与
的关系式;
(2)设
和
的面积分别为
和
,求
的最大值.
![](https://img.xkw.com/dksih/QBM/2015/5/11/1572100409991168/1572100416020480/STEM/92bb68234e674e01a96d0bc82bc1845b.png)
![](https://img.xkw.com/dksih/QBM/2015/5/11/1572100409991168/1572100416020480/STEM/761a15bccd274aadbebf656db2fda211.png)
![](https://img.xkw.com/dksih/QBM/2015/5/11/1572100409991168/1572100416020480/STEM/7ad35ebedfaf41efb267b3fa8c85aab4.png)
![](https://img.xkw.com/dksih/QBM/2015/5/11/1572100409991168/1572100416020480/STEM/21614b08ec7d4b1f9d4b8b62255a7fab.png)
![](https://img.xkw.com/dksih/QBM/2015/5/11/1572100409991168/1572100416020480/STEM/74f0aa1868aa40d39a31219eee19215e.png)
![](https://img.xkw.com/dksih/QBM/2015/5/11/1572100409991168/1572100416020480/STEM/4b86ee0185984d0193c41b7f397f2e4a.png)
(1)写出
![](https://img.xkw.com/dksih/QBM/2015/5/11/1572100409991168/1572100416020480/STEM/bcef000f3ce14ab29da34cd64d9261f3.png)
![](https://img.xkw.com/dksih/QBM/2015/5/11/1572100409991168/1572100416020480/STEM/d932dc333fd145eab6d5214a115f6aa3.png)
(2)设
![](https://img.xkw.com/dksih/QBM/2015/5/11/1572100409991168/1572100416020480/STEM/09cb4f05d6a6495a92c1e1ec137b5b5a.png)
![](https://img.xkw.com/dksih/QBM/2015/5/11/1572100409991168/1572100416020480/STEM/a30b2b42e2644a4fb24f32550c0f4e0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74ce61273bf61fe4c21726a052c24b6c.png)
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