解题方法
1 . 已知:椭圆的两焦点为
,P为椭圆上一点,且
.
(1)求此椭圆的方程;
(2)若点P在第二象限,
,求
的面积;
(3)若点P在第二象限,
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9783469a92336cfc46e94b60ebbd5c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3351fec9b1831199dfc6d6b4f0e4c3a0.png)
(1)求此椭圆的方程;
(2)若点P在第二象限,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/931741671bb117a4a3ee643f77fb293d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/002ed1ebb2cb936e10ab478789f91c7c.png)
(3)若点P在第二象限,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc57d1097c2856e87eb4a0d43936861e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/002ed1ebb2cb936e10ab478789f91c7c.png)
您最近一年使用:0次
解题方法
2 . 如图所示,
为
所在平面外一点,M、N、G分别为
、
、
的重心.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/8/a80a6619-a566-4492-aac8-cc164f50ac88.png?resizew=144)
(1)求证:平面
平面ACD;
(2)若
是边长为2的正三角形,判断
的形状并求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/8/a80a6619-a566-4492-aac8-cc164f50ac88.png?resizew=144)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe61a78f7e4eb6492278e49987b1bb0b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c4ee479000026b54146a5c6097dd6f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20be2adf81b2b8d63a020a8c0990272b.png)
您最近一年使用:0次
3 . 根据下列条件,判断
有没有解?若有解,判断解的个数.
(1)
,
,
;
(2)
,
,
;
(3)
,
,
;
(4)
,
,
;
(5)
,
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab839d8569171afab5ed55c22013aa72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3320a13248a3a1208ff6ee85c9d26f36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecc4f7ae63e7f73ea4f264b12161713.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab839d8569171afab5ed55c22013aa72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3320a13248a3a1208ff6ee85c9d26f36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57b5ec4ea2c6751adfd8ebca84d65338.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a0fe80d3539d84b821d8955a5b1a2b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1200edb2132ea2784da6fe9864d0a73c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e54a36173cd9b7b28e91619d715cb569.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11f999e5bc95d23953f2f24a15bcc172.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1200edb2132ea2784da6fe9864d0a73c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e54a36173cd9b7b28e91619d715cb569.png)
(5)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa4c355f11471a38f5583a434a1ddeb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a6fac2e71a84da2ccd4c383342a496c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa1466856bf2570685d3629c1f813748.png)
您最近一年使用:0次
4 . 根据下列条件解三角形:
(1)
,
,
;
(2)
,
,
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5742b2684d00be50a66e01c9acb6b51f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59e29b822cda1ba926e96368094fa1a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4580cc037c0c760c728cdbb74a8154c6.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e207b2baf056a7d6a6bde1f23bf12bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e54a36173cd9b7b28e91619d715cb569.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
您最近一年使用:0次
21-22高一·湖南·课后作业
名校
解题方法
5 . 在锐角
中,已知
,
,且
.
(1)求角B的大小;
(2)若
,求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a74a5e31289960f0a3efaf48ac504ad6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdfddc3a6767d52a9eff2962f63b9d8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bc9c22e445fd2e7d7e33f87116dbd1a.png)
(1)求角B的大小;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca036d049f5205cf04cb1b9c5cd03f97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
2023-10-06更新
|
630次组卷
|
8卷引用:复习题二3
(已下线)复习题二3(已下线)技巧03 解答题解法与技巧(练)--第二篇 解题技巧篇-《2022年高考数学二轮复习讲练测(浙江专用)》福建省华安县第一中学2021-2022学年高一下学期第一次月考数学试题重庆市实验中学2021-2022学年高一下学期第一次月考数学试题甘肃省金昌市永昌县第一高级中学2021-2022学年高一下学期期中数学试题江西省宜春市丰城市东煌学校2023届高三上学期11月期中考试数学试题湘教版(2019)必修第二册课本习题第2章复习题河南省许昌市禹州市高级中学2023-2024学年高三上学期11月月考数学试题
6 . 如图,A,B是某海城位于南北方向相距
海里的两个观测点,现位于A点北偏东
,B点南偏东
的C处有一艘渔船遇险后抛锚发出求救信号,位于B点正西方向且与B点相距100海里的D处的救援船立即前往营救,其航行速度为80海里/时.
(2)该救援船前往营救渔船时应该沿南偏东多少度的方向航行?救援船到达C处需要多长时间?(参考数据:
,角度精确到0.01)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b972c853c5fc127c1e532d835dc7687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
(2)该救援船前往营救渔船时应该沿南偏东多少度的方向航行?救援船到达C处需要多长时间?(参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/438bb8a162be1573f8e03f8e83575d54.png)
您最近一年使用:0次
2023-05-12更新
|
536次组卷
|
8卷引用:6.4.3.3 余弦定理、正弦定理应用举例——课后作业(巩固版)
(已下线)6.4.3.3 余弦定理、正弦定理应用举例——课后作业(巩固版)浙江省S9联盟2022-2023学年高一下学期期中数学试题(已下线)期末模拟试卷01-期中期末考点大串讲(已下线)模块一 专题3 解三角形(2)(人教B)江西省抚州市资溪县第一中学2022-2023学年高一下学期5月期中考试数学试题吉林省长春市实验中学2022-2023学年高一下学期期末数学试题(已下线)专题13 余弦定理、正弦定理的应用-【寒假自学课】(苏教版2019)(已下线)第12讲 6.4.3 第3课时 余弦定理、正弦定理应用举例-【帮课堂】(人教A版2019必修第二册)
名校
解题方法
7 . 借助国家实施乡村振兴政策支持,某网红村计划在村内扇形荷花水池
中修建荷花观赏台,助推乡村旅游经济.如图所示,扇形荷花水池
的半径为20米,圆心角为
.设计的荷花观赏台由两部分组成,一部分是矩形观赏台
,另一部分是三角形观赏台
现计划在弧
上选取一点
,作
平行
交
于点
,以
为边在水池中修建一个矩形观赏台
,
长为5米;同时在水池岸边修建一个满足
且
的三角形观赏台
,记
.
时,过点
作
的垂线,交
于点
, 过点
作OA的垂线,交
于点
, 求
,
及矩形观赏台
的面积;
(2)求整个观赏台(包括矩形观赏台和三角形观赏台两部分)面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4819c39c281427826e1b3f7a4c2b720.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4819c39c281427826e1b3f7a4c2b720.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15615de1a6df206dbd081251f676578e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/389bc3f29c058067e06e0d0d2be399da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ed01d1ff5a7f21a68fb3a1e5c7f393e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/389bc3f29c058067e06e0d0d2be399da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ffc7d1af9053b027cf9e726f5367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b2fb91028cda3644b82b04da29cbe52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4992f5a0649eba42d576321472144900.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ed01d1ff5a7f21a68fb3a1e5c7f393e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb236160cb65bc02385a0b597784646c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3458ea8ec3f3cfcc57f4f730634c2937.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce6c0e9de83f2e64ae33609fc08459d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/389bc3f29c058067e06e0d0d2be399da.png)
(2)求整个观赏台(包括矩形观赏台和三角形观赏台两部分)面积的最大值.
您最近一年使用:0次
名校
8 . 在
中,角
所对边分别为
,若
.
(1)证明:
为等边三角形;
(2)若(1)中的等边
边长为2,试用斜二测法画出其直观图,并求直观图面积.
注:只需画出直观图并求面积,不用写出详细的作图步骤.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec3f79448524d6848be51fdd5c7a150.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb1b5305cb9b5a90c4f13bceaaee4fc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8176a512a8e931c56d85607764f48851.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)若(1)中的等边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
注:只需画出直观图并求面积,不用写出详细的作图步骤.
您最近一年使用:0次
名校
解题方法
9 . 在
中,内角
所对的边长分别为
,且满足
.
(1)求
;
(2)若
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/842b8a95e1b2d938b46b865c5aca7950.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/552f2c383a417c0bb136d358ae9176ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5cbff84327e964f912a54032e76ccc9.png)
您最近一年使用:0次
2023-03-27更新
|
2080次组卷
|
5卷引用:6.1第2课时正弦定理 课后巩固提升习题2020-2021学年高一下学期数学北师大版(2019)必修第二册
名校
解题方法
10 . 在
中,是
,B,
所对应的分边别为
,
,
,且满足
.
(1)求
;
(2)若
,
的面积为
,求
的周长.
![](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/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/340997fc3cf1c311dc550b9221858db5.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](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/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
2023-08-14更新
|
1475次组卷
|
13卷引用:6.4.1 正余弦定理(精练)-2022-2023学年高一数学一隅三反系列(人教A版2019必修第二册)
(已下线)6.4.1 正余弦定理(精练)-2022-2023学年高一数学一隅三反系列(人教A版2019必修第二册)贵州省遵义市2021-2022学年高一下学期期末质量监测数学试题贵州省遵义市2021-2022学年高一下学期期末质量监测数学试题山西省山西大附属中学2023届高三上学期8月模块诊断数学试题辽宁省渤海大学附属高级中学2022-2023学年高二上学期第一次月考数学试题(已下线)专题08 解三角形-1陕西省咸阳市武功县普集高级中学2023届高三5月模考(三)数学(文)试题陕西省咸阳市武功县普集高级中学2023届高三5月模拟预测理科数学试题四川省内江市第六中学2023-2024学年高三上学期第一次月考理科数学试题四川省成都市石室阳安中学2023-2024学年高三上学期11月月考理科数学试题四川省成都市石室阳安中学2023-2024学年高三上学期11月月考文科数学试题江西省赣州市全南县全南中学2024届高三上学期期中数学试题(已下线)专题09高一数学下学期期末考点大汇总-《期末真题分类汇编》(人教B版2019必修第四册)