1 . 已知
中角
、
、
所对边分别为
、
、
,且
.
(1)求角
的大小;
(2)点
在线段
上,满足
,
,若
,求
的长.
![](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/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/c5f2efb7e4105b9746296f074697721d.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)点
![](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/f8cabcef1cee1213140371c499339864.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35333abd7f02d663d15251bc5cbbf921.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a3c442579603164f3fc19458677d307.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
名校
解题方法
2 . 已知函数
.
(1)化函数为
的形式;
(2)设
,且
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eab57bd2ec5db784c2ea27aaa59523f.png)
(1)化函数为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42f9555de3ac5de1ea69adc703b48044.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9e833034792c25135a25f451d6d46e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/603f39eac63af0b068ca2a3071bc1bfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40a8f945ca261d50888276d340da4381.png)
您最近一年使用:0次
2020-10-15更新
|
229次组卷
|
2卷引用:吉林省长春市第二中学2022-2023学年高三上学期第一次调研测试数学试题
名校
解题方法
3 . 如图,点
在
的边
上,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8898171153a8ceed22501505b50fbf37.png)
![](https://img.xkw.com/dksih/QBM/2020/6/16/2485955080552448/2486618156802048/STEM/16e25efe97db460abdfb1302499733a3.png?resizew=231)
(1)求
和
;
(2)若
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8898171153a8ceed22501505b50fbf37.png)
![](https://img.xkw.com/dksih/QBM/2020/6/16/2485955080552448/2486618156802048/STEM/16e25efe97db460abdfb1302499733a3.png?resizew=231)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8e5d4f93699f8dcffb0e7840ca5597e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d1e5b7b1d5b077dabafae425a08d765.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c32e2f2d7147cf1699fbfdef9cf4af74.png)
您最近一年使用:0次
2020-06-17更新
|
969次组卷
|
3卷引用:吉林省东北师范大学附属中学2020届高三第四次模拟考试数学(理)试题
11-12高三上·吉林白山·阶段练习
名校
4 . 设
是平面上的两个向量,若向量
与
互相垂直.
(Ⅰ)求实数
的值;
(Ⅱ)若
,且
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00c2c78521e50eb6c14a38a241ded7b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9cd8bbf47b69bbd7a6263b041290d11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bca35e52b8430246a1cf96e9e617cce.png)
(Ⅰ)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cde095a97f35f6b708d544608e6a6c4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2adb91c4eea578ed8f41b438200682d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cc9750c313ee972124cb62c4a6fb7ea.png)
您最近一年使用:0次
2016-12-01更新
|
1151次组卷
|
6卷引用:2011-2012学年吉林省白山市友好学校高三年级12月联考理科数学试卷
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