题型:解答题-问答题
难度:0.85
引用次数:1066
题号:18718212
已知平面向量
.
(1)若
,且
,求
的坐标;
(2)若
与
的夹角为锐角,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26a8d539d0c0a4a50076101ba611cedc.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a895a32bb2e93c07d0ecf3d60cdfbdf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dd1f0e20049dcb0a3a817e4399048ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d366d8fbb7258ee051f49977441e14a2.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afae9db82464afb37d387f6cbedc8139.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
更新时间:2023-04-15 17:55:43
|
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解答题-问答题
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较易
(0.85)
解题方法
【推荐1】设两个向量
满足
.
(1)若
,求
的夹角
;
(2)若
的夹角为
,向量
与
的夹角为钝角,求实数t的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e8b95a61af300412fc65f846089028.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9aaca37b53f66aefdbffd2a4b0d7504.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23e63565b4dc023dff120ac007c4bc8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e8b95a61af300412fc65f846089028.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e8b95a61af300412fc65f846089028.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12dfa2b2e9488107d07fdac71f433774.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6d7ba9c5074d45752fb01ade0f441d1.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
名校
解题方法
【推荐2】已知
,
,
是同一平面内的三个向量,其中
.
(1)若
,且
,求
的坐标;
(2)若
,且
,求
与
的夹角
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d366d8fbb7258ee051f49977441e14a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9338520b3ccd2d16e0db9acf8fdd1465.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/561d4ba1c70c5e150aed27baa724d7d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0d2cd576db6f49273ae6c59f3652cc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d366d8fbb7258ee051f49977441e14a2.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf342e77c56e55a35bb1151bc215a3a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63089994b9be5f9532155288f2c4922b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
您最近一年使用:0次
解答题-证明题
|
较易
(0.85)
【推荐1】设向量
,
,
.
(1)求
;
(2)若
与
平行,求
的值;
(3)求证:
与
垂直;
(4)求
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/010632a752a68ced11aaf8ac2f3be311.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fe274c1abd217bba785a193f9a2ded1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccbac0b7aae1810196fb8b2ac5a2861b.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2def9368c3513ae1afb361b56dd06b2.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/437dc907211c5934f938d869f6b19e93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ed521b8d2a27df838534e3b787b3dd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(3)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed492f7b29166ba5c1f0023b05a439c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b20f69af6870bada879cddd7f6794d24.png)
(4)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/770b200e9fc16b3da9d38e37bb17d63b.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
解题方法
【推荐2】已知向量
,
.
(1)求向量
、
的夹角的大小;
(2)确定实数
的值,使
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10794c9dac9d66e16d7509d3f6f0a41d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67584e2063b8190b096eda30501e596b.png)
(1)求向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
(2)确定实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eb1cc97795e7626cc2f082e7f39a867.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
名校
【推荐3】已知向量
,
,
.
(1)若
,求
;
(2)若
,求
与
的夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2a61c7b048061e6ad2dd825c738538b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22b7a2a49ee653602bbb0b300113b418.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd3d0175ce9c583c394c44b0a22e894a.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3882e50ded399a3380aa44d18b0f8cdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5095a28bb1b91bf6bed9e2cfbd76bb18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7e07c25df57a36d4f1b11d7d9fe16b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb573cc0f30d5c32cdad1510793f0e7b.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
解题方法
【推荐1】在直角三角形
中,
,求实数k的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8ae4befda15ca2b7d8beca365cec7e5.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
【推荐2】平面内三个向量
,
,
(1)以
,
为基底表示向量
;
(2)若
,且
与
方向相反,求
的坐标;
(3)若
,求
在向量
上的投影向量的模.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6569e50f43b3d8645652ecc13b62066e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eddbbab37f208b0cbbd5caa08840490.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0505bb344f07a32a6966ff2583c80e10.png)
(1)以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb573cc0f30d5c32cdad1510793f0e7b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2aa56fb896d0c3a9a377c10d3b52afcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec655f610928ca21831e26645a21e99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec655f610928ca21831e26645a21e99c.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61061405ac75f4f9db1836b44bd839f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09c8bec36916abf7f28d8f09e57ead83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
名校
解题方法
【推荐1】已知:
,
,
是同一平面内的三个向量,其中
.
(1)若
,且
,求
的坐标;
(2)若
,且
与
垂直,求实数
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb573cc0f30d5c32cdad1510793f0e7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6569e50f43b3d8645652ecc13b62066e.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec41eae333bbceddb0da14c824324d1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e707a0396ffea2bc622204a1cc7ed2e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb573cc0f30d5c32cdad1510793f0e7b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ef4103fa37f6d8f5bb4bcace8e72ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0067ea61ac2abd75b17f906c13fd6879.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
解答题-问答题
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较易
(0.85)
解题方法
【推荐2】已知点A的坐标为
,且
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61f04c3bcb55b79a6b68541d87060189.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/329fdf7d989f77a32ca9e0361a9cc956.png)
您最近一年使用:0次