1 . 在
中,内角A、B、C所对的边分别是a、b、c,已知
,A为锐角.
(1)求角A的大小;
(2)在①
的面积为
,②
,③
这三个条件中任选一个补充在下面的横线上.
问题:若
,___________,求b、c的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8781a9ab8eccb8f085f7a96e4123676a.png)
(1)求角A的大小;
(2)在①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5eeefa3c7678900a6aabec118757db8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17ee9add4ad9206f067f4a23f7ba76e9.png)
问题:若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2a4acf9834952c624505c2b4774294f.png)
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2022-03-11更新
|
720次组卷
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6卷引用:贵州省铜仁市2022届高三适应性考试数学(理)试题(—)
贵州省铜仁市2022届高三适应性考试数学(理)试题(—)贵州省贵阳市2022届高三适应性监测考试(一)数学(文)试题贵州省贵阳市2022届高三适应性考试(一)数学(理)试题(已下线)回归教材重难点02 三角函数与解三角形-【查漏补缺】2022年高考数学(文)三轮冲刺过关江苏省无锡市江阴市两校联考2023-2024学年高一下学期阶段检测(一)(3月)数学试卷山西省朔州市怀仁市第一中学校2023-2024学年高一下学期第二次月考(3月)数学试题
名校
解题方法
2 . 在数学中,有多种方程都可以表示心型曲线,其中著名的有笛卡尔心型曲线.如图,在直角坐标系中,以原点
为极点,
轴正半轴为极轴建立极坐标系.图中的曲线就是笛卡尔心型曲线,其极坐标方程为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d48085c5aa3deb1fbdfa812daee0590.png)
,
为该曲线上一动点.
![](https://img.xkw.com/dksih/QBM/2022/3/9/2932408168513536/2933828616667136/STEM/3a4c700f-3e34-4408-8583-980dfe38a3d9.png?resizew=200)
(1)当
时,求
的直角坐标;
(2)若射线
逆时针旋转
后与该曲线交于点
,求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d48085c5aa3deb1fbdfa812daee0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfba6e427bfcff921f2afd9ce0bc7559.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://img.xkw.com/dksih/QBM/2022/3/9/2932408168513536/2933828616667136/STEM/3a4c700f-3e34-4408-8583-980dfe38a3d9.png?resizew=200)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e5b9350de79c138cd90667735095fd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)若射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ad72d7565699d1ebb741eb0ce12bac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25dd698d57d1cf239eb8752aecaaa4f4.png)
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2022-03-11更新
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2008次组卷
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12卷引用:贵州省名校联盟2022届高三3月大联考数学(理)试题
贵州省名校联盟2022届高三3月大联考数学(理)试题贵州省名校联盟2022届高三3月大联考数学(文)试题吉林省白山市2022届高三一模数学(文)试题吉林省白山市2022届高三一模数学(理)试题陕西省榆林市2022届高三下学期二模文科数学试题陕西省榆林市2022届高三下学期二模理科数学试题内蒙古呼伦贝尔市2022届高考二模数学(文科)试题内蒙古呼伦贝尔市2022届高考二模数学(理科)试题(已下线)回归教材重难点02 三角函数与解三角形-【查漏补缺】2022年高考数学(理)三轮冲刺过关山西省太原市第五中学校2022届高三下学期5月阶段性检测数学(理)试题(已下线)押全国卷(文科)第22题 坐标系与参数方程-备战2022年高考数学(文)临考题号押题(全国卷)山西省太原市第五中学校2022届高三下学期5月阶段性检测数学(文)试题
名校
解题方法
3 . 如图,在正方体
中,AB=2,E,F,P,Q分别为棱
,
,
,BC的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/d9a776e6-58e5-41fa-8367-6c3a870b2dcf.png?resizew=175)
(1)证明:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
平面
.
(2)在棱
上确定一点G,使P,Q,
,G四点共面,指出G的位置即可,无需说明理由,并求四边形
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/d9a776e6-58e5-41fa-8367-6c3a870b2dcf.png?resizew=175)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b70d05c03d14c3bd6f61746e556c1f85.png)
(2)在棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394c5d2f55221975503be8aa18022480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82f0cd7f2db3d44cd398f731670b70b1.png)
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2022-03-09更新
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483次组卷
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2卷引用:贵州省黔东南州2022届高三一模考试数学(文)试题
解题方法
4 . 在
中,角
,
,
的对边分别为
,
,
.已知
,
.
(1)求角
的大小;
(2)再从①
,②
,③
这三个条件中任选一个作为已知条件,求
的面积.(如果选择多个条件分别解答,按第一个解答记分)
![](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/3f92da92994be0ec1234caf352e7b906.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e47ea9f86b0512819a4293ae1ee45da.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)再从①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28dacf57cfb776011d9783e51670481d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/326d175e434d12aaf5c43c6601d57b99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59f898d18892ac289aa13a409d952fa8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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2021-12-15更新
|
698次组卷
|
3卷引用:贵州省毕节市2022届高三上学期诊断性考试(一)数学(理)试题
名校
解题方法
5 . 已知在
中,角
所对的边分别为
,且满足
.
(1)求角
的大小;
(2)若
的面积为
,且
,求
的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a94a20c8251fdd95d733dd3bffac2c80.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41322821ce31416fdac8dd6e0aa41c71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60f318dae61e291e3c28eff545f44787.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
2021-06-28更新
|
1392次组卷
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5卷引用:贵州省贵阳市修文县2022届高三下学期第二次模拟考数学(理)试题
名校
解题方法
6 . 在
中,内角
,
,
所对的边分别为
,
,
,已知
.
(1)求B;
(2)当
,求
的周长的最大值.
![](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/94349b1ec6e2e23ce3fdf8c4904a283f.png)
(1)求B;
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcdb7a488910743dc5c63afb394b87e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
名校
7 . 在
中,角
的对边分别为
,且
.
(1)求A的大小;
(2)若
,且
的面积为
,求a的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54f1ebd7518e77d8f3c28380dd06c39b.png)
(1)求A的大小;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f65649fc2d073247e27a760b32541f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
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2021-06-26更新
|
1372次组卷
|
3卷引用:贵州省瓮安中学高三2021届6月关门考试数学(文)试题
贵州省瓮安中学高三2021届6月关门考试数学(文)试题黑龙江省大庆中学2020-2021学年高一下学期期末数学试题(已下线)专题08 三角函数与解三角形-备战2022年高考数学母题题源解密(新高考版)
8 . 在直角坐标系
中,曲线
的参数方程为:
(
为参数).以坐标原点为极点,以
轴正半轴为极轴建立极坐标系,直线
的极坐标方程为:
(
)
(1)求曲线
的普通方程和直线
的直角坐标方程;
(2)
,直线
与曲线
相交于
,
两点,若
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/172837ef779a4c44961bb1bbb5092f8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6581916f5a65edfea257c804efee007e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d5ca4c1bc980f8daf0f6bb66b0170f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c65b6c42393fae47c51101713167ff71.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33cc0f9aa168e43cc5759f017d69b498.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23e85c53caab8965b6aa3a6e2d4acf72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d66c03d4ca06819a6ce7fc8ea6de0f0.png)
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2021-05-05更新
|
1081次组卷
|
7卷引用:贵州省贵阳市五校(贵阳民中 贵阳九中 贵州省实验中学 贵阳二中 贵阳八中)2022届高三下学期联考(五)数学(文)试题
名校
解题方法
9 .
的内角
,
,
的对边分别为
,
,
.已知
的面积为
,
.
(1)若
,求
;
(2)若
为
边的中点,求线段
长的最小值.
![](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/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edb57d84f9bbcb3e30d4ce7e2e1e8604.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc8c65bea2c80af038768b74250c694e.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1987c5e0f9352579b749223d5a2f99da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](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/03902478df1a55bc99703210bccab910.png)
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2021-05-05更新
|
965次组卷
|
3卷引用:贵州省普通高等学校招生2021届高三适应性测试(3月)数学(理)试题
10 . 已知抛物线
的焦点为F,点M在抛物线C上,点
.若当
轴时,
的面积为5.
(1)求抛物线C的方程;
(2)若
,求点M的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e6c830bfa9a1b979a1a9665166424bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10cf772932979ca4c627c7f5683a4bab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f7e98fa4da2def9eebd11a349b83e87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48ecbec8422e7d36b2ee029596610a48.png)
(1)求抛物线C的方程;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2dfaebd7fc918e3d22b2d78510ce79e.png)
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