名校
解题方法
1 . 已知两个单位向量
的夹角为60°,则下列向量是单位向量的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d194ecefc9101001d88d3cc0bc9d6ef.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
2 . 在平面直角坐标系
中,已知圆
,
是圆
上的两个动点,
,则
的取值范围为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5314e211336ef079d10c67966c3a851.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ace585d3cc2e113a0927cdf9e56756a.png)
您最近一年使用:0次
2016-12-04更新
|
680次组卷
|
3卷引用:2015-2016学年江苏盐城市高一下学期期末数学试卷
名校
3 . 已知
外接圆
的半径为4,且
,
,则
的值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ee69beb12032a88c82f398f7109d1ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33632913a5cd8f0ffada8f8c44f834f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/660d411077d7809d006fb3d534314ca1.png)
A.![]() | B.16 | C.48 | D.![]() |
您最近一年使用:0次
解题方法
4 . 在
中,
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9dd315a4f697285399eb924e7736116.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f691d35b43920b4cccebe507aefd0b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70dc2c20619a4fc12a0cfda59af5b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9dd315a4f697285399eb924e7736116.png)
您最近一年使用:0次
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5 . 平行四边形ABCD中,
,求:
(1)
的值;
(2)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c03ffc540ce28b441934b77675690f14.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a47b376264d525c790ebad49a849c08.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5cb63aeea0b37799404c8fec092b21d.png)
您最近一年使用:0次
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解题方法
6 . 在
中,角
所对的边分别为
,若
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27ba370a3912d1a983146af9c7f9c950.png)
_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://img.xkw.com/dksih/QBM/2015/9/16/1572234316726272/1572234322411520/STEM/e5543c86c20c4c2cb07cae6674c23e42.png?resizew=49)
![](https://img.xkw.com/dksih/QBM/2015/9/16/1572234316726272/1572234322411520/STEM/a1c5d8c8c37444c1a282d7d8a4ef83df.png?resizew=40)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65397f11ea8af736f38debadf420c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4580cc037c0c760c728cdbb74a8154c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cd0ce00ee2d0e844f6eef2e2d29e0fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27ba370a3912d1a983146af9c7f9c950.png)
您最近一年使用:0次
2016-12-03更新
|
734次组卷
|
3卷引用:2014-2015学年江苏省盐城市高一下学期期末考试数学试卷
解题方法
7 . 已知
是边长为
的等边三角形,点
在边
上,且
,则
的值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](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/d39b6bef27de230acad352f25e954f4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19a249697aea49187395a893e83a2adb.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2018-01-12更新
|
568次组卷
|
2卷引用:江苏省盐城市东台创新高级中学2020-2021学年高一下学期3月检测数学试题
13-14高三下·山东淄博·阶段练习
名校
8 . 在直角三角形
中,
,
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ecbdd03ce188e8a1e04bad54363cccd.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d622485f4dfbc4cb2c30a4f4c93bb45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1b4486503d7ef4389c6954d0db48a57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/915cde284a4cca236ad6631784bd93c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ecbdd03ce188e8a1e04bad54363cccd.png)
您最近一年使用:0次
2016-12-03更新
|
764次组卷
|
9卷引用:江苏省盐城中学2019-2020学年高三年级第二次阶段性质量检测(12月) 数学
12-13高一下·江苏盐城·期末
名校
解题方法
9 . 在边长为1的等边
中,设
,
,
.则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fdf6f4e96b231e2802b5d6059451534.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7009c25899887e6df12cbc80034cb39f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c84eca96d76aebf52827bb14b41c22fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8392cfcfc4a0788662fae155a88adf0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fdf6f4e96b231e2802b5d6059451534.png)
您最近一年使用:0次
名校
解题方法
10 . 设
面积的大小为
,且
.
(1)求
的值;
(2)若
,
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05490f000d618b37f6df19f555f1db24.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b01adc561735ff5be9bb97266918f2.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3578b63c5903089595bf324c809a997c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49df6c4a029846ad635e714c052056d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
您最近一年使用:0次
2017-05-14更新
|
513次组卷
|
3卷引用:江苏省盐城市2017届高三第三次模拟考试数学(理)试题