1 . 四边形ABCD是边长为1的正方形,则
=________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4667a0ce4bbfd6815b1b950f64d5c23e.png)
您最近一年使用:0次
解题方法
2 . 正
中,
在
方向上的投影为
,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4618e75fd728301239160a2c18273816.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9795e7f5cb9b366776c41d8f3f43942.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d792a2aa25763e14cc2863be3887000.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e8488ec91652ad560475f6d45c8e20b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4618e75fd728301239160a2c18273816.png)
您最近一年使用:0次
2016-12-04更新
|
720次组卷
|
3卷引用:2016届江西省高安中学等九校高三下学期联考理科数学试卷
2014·四川资阳·一模
解题方法
3 . 在Rt△ABC中,
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6182cef849b9c74f519c5924203dba27.png)
_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aebec30356b590a72bc2a75f9b09221.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4c5cd6ce30ac70cd343334139c1a478.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c278812c4813f6391c7993574e2f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6182cef849b9c74f519c5924203dba27.png)
您最近一年使用:0次
4 . 在
中,
,
,
是边
的中点,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/465f4f749b575f199874f011ada4274f.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70dc2c20619a4fc12a0cfda59af5b69.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/465f4f749b575f199874f011ada4274f.png)
![](https://img.xkw.com/dksih/QBM/2019/3/7/2155343592669184/2159430543925248/STEM/13a637fd5d384a3ea91aa28946f6360f.png?resizew=176)
您最近一年使用:0次
2016-11-30更新
|
1406次组卷
|
9卷引用:2007年普通高等学校招生考试数学(文)试题(天津卷)
2007年普通高等学校招生考试数学(文)试题(天津卷)(已下线)2010年浙江省杭州市七校联考高一下学期期中考试数学(已下线)2011-2012学年江苏省淮安中学高一上学期期末考试数学试卷(已下线)2015届天津市天津一中高三上学期零月月考文科数学试卷【市级联考】江苏省淮安市2018-2019学年高一(上)期末数学试题上海市复兴高级中学2015-2016学年高一下学期5月月考数学试题(已下线)题型04 平面向量数量积与三角形平面向量中线定理-2020届秒杀高考数学题型之平面向量(已下线)题型04 平面向量数量积-2021年高考数学题型秒杀之平面向量上海市闵行中学2021-2022学年高一下学期5月月考数学试题
5 . 已知点D为
ABC的BC边的中点,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff6d838c156e98b50813db582fcf7aac.png)
_______________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6595597d25112f247753397d25bf5080.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a3f1cd68d735820cbe6bff34e7d1477.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff6d838c156e98b50813db582fcf7aac.png)
您最近一年使用:0次
6 . 在
中,若
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a779e711b3900db89bd868360dcfaa.png)
_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c651854efc9e55ae46d7a891662cbd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f49c226f8c890d4309469c5edb9923d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a779e711b3900db89bd868360dcfaa.png)
您最近一年使用:0次
2015-11-03更新
|
560次组卷
|
2卷引用:2014-2015学年江苏省南通市如皋中学高二下学期期末文科数学试卷
9-10高一下·安徽·期中
7 . 已知向量![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79ab5750b88b27b605f39440e01e62f.png)
=____
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79ab5750b88b27b605f39440e01e62f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbb006ea697b63a914eb487073f0abe1.png)
您最近一年使用:0次