解题方法
1 . 已知
,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af060f42e65bde15907dbb87c1e6318a.png)
A.若![]() ![]() |
B.若![]() ![]() ![]() ![]() |
C.若![]() ![]() ![]() ![]() ![]() ![]() |
D.![]() ![]() |
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解题方法
2 . 若平面向量
与
的夹角为60°
,则
等于( )
![](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/11fe21e4310277189ba4082aae08cc88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c75a15198f2465863fd46e0794d0bf2.png)
A.![]() | B.![]() | C.10 | D.12 |
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解题方法
3 . 对任意两个非零向量
,定义
.若非零向量
,满足
,向量
与
的夹角是锐角,且
是整数,则
的取值范围是_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/662917aedec92809a13618093c8e0c3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63c7ac4b4b9924ef29792fa6ac198f06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e8b95a61af300412fc65f846089028.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26739971f3cae6d4790870c344b5cf89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b35bee611ba4204db25848d5925c618d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4db35dbee504e3e66bfd03c24e4b7322.png)
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4 . 已知向量
.
(1)若
,求
的值.
(2)设
,向量
与
的夹角为
,求
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba5cd28f5401f9c5cee53caf5a14263a.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91b958a367fa2f08b6202a5a6ebf5e9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a603069cf81f5ff7a40bc24e1be8be7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
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解题方法
5 . 在等腰直角
中,
,
,M,N为AC边上的两个动点,且满足
,则
的取值范围为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af260e0d98c95d1e092dc4c6d348e3ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f121eabff3c62c1a196d9ca5f6f83f0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/056c2272e0d10d6dd9706e6324d8e62d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43edc7cf4e4ca28b7125ca4ba1fa7add.png)
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解题方法
6 . 已知平面向量
,
,且
,
,向量
满足
,则
取最小值时,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5085e3cdef9ea6c564e079f745d6fdb.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/c9a5451e35042092a0cdc5971a4d55e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e37157acb52896b1d3d067adc7d381b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d366d8fbb7258ee051f49977441e14a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59d3e5619718e1bb2592caf48bcc2718.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5b0a4509691f41732a190fceef0175.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5085e3cdef9ea6c564e079f745d6fdb.png)
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名校
7 . 已知
中,角
的对边分别是
,
,
,且
.
(1)求角A的大小;
(2)求
的最大值;
(3)若
,
为
边上靠近B点的三等分点,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/516983449108347c9bbf5dd2a72ab3dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d90d7f054e8f0346479e1999622f11cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a8c463f847a2360d2ce5d2de4f17be4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/452e15519f305e5afbc184116b4691a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2758285d3c1d8c16784edbc5f572fc26.png)
(1)求角A的大小;
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dfa04ed69eb5e36931c076e0cf3f01e.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.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/15c0dbe3c080c4c4636c64803e5c1f76.png)
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名校
解题方法
8 . 若平面向量
,
,
两两的夹角相等,且
,
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7891ac38d0087802fafc88ec9e5bc89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73a0b19e69be46452425916a0fcb49c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a1fbde1de351bce74ea7736f16340a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7af485413186ab3208767bc6637fb89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/856257379ffdc3939b9aaea9007a6951.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f6b07640a27cf91c0a1c4d6c7457652.png)
A.![]() | B.5 | C.![]() | D.![]() ![]() |
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名校
9 . 已知平面向量
,则下列命题一定正确的有( )
①若
,则
②若
,则存在实数
,使得![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6836870d047ff2faeea5d05721f4058.png)
③若
,则
④![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a801d21dab86af22e289081213703fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a0a32446aed06817f5f72abf7fdae4b.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/286264a49cd533a67033cfe532b80108.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/994b645edf923a6644eb540c1f4a8dad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66d76ee2e81f447f84a3e0b39c0388ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6836870d047ff2faeea5d05721f4058.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65f97c8e44527c0b2d0252be8ba4729c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fde8e39a2679babf24eb124ddda20ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a801d21dab86af22e289081213703fc.png)
A.0个 | B.1个 | C.2个 | D.3个 |
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名校
10 . 已知
外接圆的圆心为M,半径为r,且
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84c1b00aa17d7376561138a18d3d8cf5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50f3b22560c36768d7938cb94d8bec3b.png)
A.![]() | B.![]() | C.2 | D.3 |
您最近一年使用:0次