解题方法
1 . 已知直线l倾斜角的余弦值为
,且经过点
,则直线l的方程为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71d141e18938319cc05063d29c111557.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80991c1f0c963104740e50cfff6f29a8.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2 . 已知
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73f06a002a861a5a11be6842fd075a51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9c1f914da4657eca7865982b130b299.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
3 . 已知
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/054768e8727bc25eb2520b8a1bc301f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4fed22c36f1c0b5d5d27b27f9a059f7.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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4 . 已知向量
,
,当
取得最大值时
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e5d4af9e447f5437018b6b2067218a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a98d7596d36f19eacb8002244f8fcca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c39d1d88189726ae99c309644fca3494.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e304cf018473bb54edb166fcd6502b.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
5 . 已知
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/536e072eb0439a5e5b430cd55a129374.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b49be8aecafd442eddaa5251c31faede.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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6 . 若
,且
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c414f1528d2592c7b16d68bf8760da15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/265bb797acf99bb79d859795b6295ede.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4619509e2dd50c52274dbede9b7f883.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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7 . 已知向量
,若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cf3bee7be45550bf2cf7986bf78d48c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bf21fef3026cfe445a855c94cab5c84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60b9aceea086efe900c1faebf33ae5ac.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
8 . 已知
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aabf9fb99343704daad3c4ee473b8433.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fce6eb40ee34618946c04434997f76d5.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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9 . 若
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dcbe8b4bcd32e5a64ebfd873f8cbb2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b7372473efa3f5665794794fd7ddca2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7505881a55b2dbe88fd6c47406eba57.png)
A.3 | B.![]() | C.5 | D.![]() |
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解题方法
10 . 若
,则曲线
在点
处的切线的斜率为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51474d91e540a475138571e8738de850.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44cc9e08df4aea41302a0d0da873dc49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8e7541a9617d4eaf292dcab325523cb.png)
A.![]() | B.![]() | C.2 | D.![]() |
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