已知
的三个内角
,
,
的对边分别是
,
,
,且
.
(1)求角
;
(2)若
,
的面积为
,求
的值.
![](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/cb084c14264b0f6ddcaf513b062dd459.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7fa79a550591eb9e1bd07bced3a08fc.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/980ab4deb9e7f2bc9288787f5243a4d2.png)
2021·山东济宁·一模 查看更多[4]
山东省济宁市2021届高三一模数学试题(已下线)押第18题三角函数-备战2021年高考数学临考题号押题(浙江专用)山东省临沂市郯城县郯城第二中学2022-2023学年高三上学期期末数学试题河北省石家庄市辛集育才中学2024届高三上学期12月月考数学试题
更新时间:2021-03-18 15:10:38
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相似题推荐
【推荐1】在
中,角
所对的边分别为
已知
,面积
,再从以下两个条件中选择其中一个作为已知,求三角形的周长.
(1)
;
(2)
.
注:如果选择多个条件分别解答,按第一个解答计分.
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/820a061e719638db13ef8b47f8627ef8.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4c5cd6ce30ac70cd343334139c1a478.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64afdc6fcdc4cd326bb11679766c223e.png)
注:如果选择多个条件分别解答,按第一个解答计分.
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适中
(0.65)
【推荐2】已知△ABC中,角A,B,C所对的边分别为a,b,c,且3a2+ab-2b2=0.
(Ⅰ)若B=
,求sinC的值;
(Ⅱ)若sin A+3sin C=3sin B,求sinC的值.
(Ⅰ)若B=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65af1d6b6b831ebbdc36dda5f304a3a1.png)
(Ⅱ)若sin A+3sin C=3sin B,求sinC的值.
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解答题-问答题
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适中
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解题方法
【推荐1】已知
中,角
、
、
所对的边分别为
、
、
,且
.
(1)求角
的大小;
(2)若
的面积为
,且
,求边
的长度.
![](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/28ae91a00ae84a1de0ac9b984b5d7800.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81c00f7e3c9b3ca278015e3ec031f102.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49dcdf048e907e670072f1070c8a8b6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
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【推荐2】在①
;②
;③四边形ABCD面积为
这三个条件中任选一个补充到下面问题中,并求解.
问题:在平面直角坐标系中,O为坐标原点,圆O经过点
.
(1)求圆O的方程;
(2)四边形ABCD外接于圆O,其中A,D关于y轴对称,直线AB的倾斜角为
,且______,求
值.
注:如果选择多个条件分别解答,按第一个解答计分.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64949fa593d99f9c2c8fa35767a2bb22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833cfda415649b832cc136caed392753.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7cb903441d8e6b4448c3d5d7959d9d7.png)
问题:在平面直角坐标系中,O为坐标原点,圆O经过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/555138af18a707b89b5261bdfcd47763.png)
(1)求圆O的方程;
(2)四边形ABCD外接于圆O,其中A,D关于y轴对称,直线AB的倾斜角为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f785147690f83dcee0a0bc6c327e75a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54b5813fc218a9ba8d3204c1b38f1993.png)
注:如果选择多个条件分别解答,按第一个解答计分.
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【推荐1】在锐角
中, 角
、
、
的对边分别是
、
、
,
, 且
.
(1)求角
的值;
(2)设
是
的中点, 在①
;②
;③
这三个条件中任选一个, 求
的面积.
![](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)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49e59877d3799fbe5c54ee692459ba97.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41ed10869ac6e63757086eaafc6b81b5.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/486cdec3554eac8d35a7a16085a46dda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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解题方法
【推荐2】锐角三角形
中,角
所对的边分别为
,且
.
(1)求角
的大小;
(2)若
,
为
的中点,求中线
长的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.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/6f3cb51e5196112a7fcc038b84577b12.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f002f960ec07ea229ed243e2d991d83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
您最近一年使用:0次