解题方法
1 . 如图.在四边形
中.
,
,
.
![](https://img.xkw.com/dksih/QBM/2021/4/29/2710132490264576/2799508025925632/STEM/f1ca62e0-4662-431b-a2d8-3d27451694ef.png?resizew=244)
(1)求四边形
的面积t
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2a4a4dc4befec21cb379b38a134f4ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/143e743575e406a4e5009c5727282417.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da7309fc0a8cde0ba9365d7fe1ce4d3f.png)
![](https://img.xkw.com/dksih/QBM/2021/4/29/2710132490264576/2799508025925632/STEM/f1ca62e0-4662-431b-a2d8-3d27451694ef.png?resizew=244)
(1)求四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a14dd0cfda3741deccc80e89b6c2a233.png)
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2021-09-02更新
|
173次组卷
|
2卷引用:山西省大同市灵丘一中、广灵一中2020-2021学年高一下学期期中联考数学试题
解题方法
2 . 在
中,内角
,
,
所对的边分别为
,
,
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f774cd650f14c8f6e4fe0c6a432768bb.png)
____________ .
![](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/f29fdf4b644ebd055de5710e38c15c6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f774cd650f14c8f6e4fe0c6a432768bb.png)
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3 . 已知正四棱锥
的侧棱长为
,且
,若一只蚂蚁从点A出发沿着该四棱锥的侧面爬行一周回到点A,则蚂蚁爬行的最短距离为_______________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41322821ce31416fdac8dd6e0aa41c71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a11cac99731f3da761b4e0b50c6c5ee.png)
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名校
解题方法
4 . 在
中,角
的对边分别为a,b,c,已知
.
(1)求角B;
(2)若
,求
的面积.
![](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/aebe81d90dad0db8d1883ead8cc909f0.png)
(1)求角B;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/922379d01b47d2cc3b6783d23c0a6c56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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2021-08-31更新
|
331次组卷
|
2卷引用:山西省吕梁市柳林县2020-2021学年高一下学期期中数学试题
名校
解题方法
5 . 在
中 ,角
所对的边分别是
,根据下列条件解三角形
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81fcb10b15305cfc65f9c3c4ca4986c3.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/298f468e768655fee982d80b3f39523c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9720430f7a78087a509e5ae5b764442.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81fcb10b15305cfc65f9c3c4ca4986c3.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72aeee67b7cc0e6f4072b1bec52cb552.png)
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解题方法
6 . 已知
分别为
内角
的对边,
.
(1)求![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80e55a60c8f81010d730e347a8c0a656.png)
(2)已知
且
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](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/ba8cd7c786e0d8ca4a2488fdc71f750d.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80e55a60c8f81010d730e347a8c0a656.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f48cb56285aa78588baa224f732ff64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70131e89d93c7bea5dc0c9dd6ace35e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
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名校
解题方法
7 . 在
中,内角
的对边为
,若
的倒数成等差数列,则( )
![](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/76f0649064a085fb74c997fb507a9b6d.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2021-08-16更新
|
250次组卷
|
2卷引用:山西省太原市2020-2021学年高二下学期期中数学(文)试题
解题方法
8 . 在
中,内角A,B,C的对边分别为a,b,c,若
,则
的面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c365a0e60398044d47f4ad7cf247a40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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9 . 在
中,内角
、
、
的对边分别为
、
、
,且
,
.
(1)若
,求
;
(2)若
,解这个三角形.
![](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/6129fbf40a950fc8c516f0abaab21957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad09921d9904335a83078262ce62a473.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/058958067e67058f3342b26b2406f832.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3578b63c5903089595bf324c809a997c.png)
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