1 . 已知向量![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff182df5607e90450d212afd997b7523.png)
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff182df5607e90450d212afd997b7523.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4ef9f7f62c00bf7d33d53872472c35f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27b988d81f63ca329c85840e030f6505.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2019-08-23更新
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749次组卷
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2卷引用:河北省张家口市2019-2020学年高三11月阶段检测数学(文)试题
名校
2 . 设集合
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98ecfa5aeaf5388f8780b0f960d330ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b9b470218359a4a47be9244980489e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2019-08-23更新
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1180次组卷
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7卷引用:2019年10月江西省高三第一次大联考数学(文)试题
3 . 若过点P(1-a,1+a)与Q(4,2a)的直线的倾斜角为钝角,且m=3a2-4a,则实数m的取值范围是________ .
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2019-08-17更新
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1004次组卷
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5卷引用:狂刷40 直线与方程-学易试题君之小题狂刷2020年高考数学(理)
(已下线)狂刷40 直线与方程-学易试题君之小题狂刷2020年高考数学(理)智能测评与辅导[文]-直线与圆(已下线)专练13 倾斜角与斜率-2021-2022学年高二数学上册同步课后专练(人版A版选择性必修第一册)(已下线)第05讲 倾斜角与斜率(教师版)-【帮课堂】2023版 湘教版(2019) 选修第一册 过关斩将 第2章 2.1 直线的斜率
4 . 已知
是以
为直径的半圆弧上的动点,
为圆心,
为
中点,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10908218148af79fd79ec92061652af3.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10908218148af79fd79ec92061652af3.png)
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5 . 如图,⊙O的半径OB垂直于直径AC,D为AO上一点,BD的延长线交⊙O于点E,过E点的圆的切线交CA的延长线于点P.
求证:PD2=PA•PC
求证:PD2=PA•PC
![](https://img.xkw.com/dksih/QBM/2018/11/16/2076809708109824/2078307597312000/STEM/23a2012e-b378-468a-81a7-84d80fbd22c3.png?resizew=186)
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6 . 如图,已知⊙O的直径AB与弦AC的夹角为35°,过C点的切线PC与AB的延长线交于点P,那么∠P等于( )
![](https://img.xkw.com/dksih/QBM/2017/8/14/1758848850362368/1816566449266688/STEM/304ffc3c6e624c8fa4f26438214df6eb.png?resizew=107)
![](https://img.xkw.com/dksih/QBM/2017/8/14/1758848850362368/1816566449266688/STEM/304ffc3c6e624c8fa4f26438214df6eb.png?resizew=107)
A.15° | B.20° |
C.25° | D.30° |
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7 . 如图,PA是⊙O的切线,A为切点,PC是⊙O的割线,且PB=
BC,则
等于( )
![](https://img.xkw.com/dksih/QBM/2017/8/14/1758848850362368/1816566449258496/STEM/7c9a74053fb14ddbbf745b63add9ce9a.png?resizew=111)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ccc2f02416db8211128e18af2d13ecf.png)
![](https://img.xkw.com/dksih/QBM/2017/8/14/1758848850362368/1816566449258496/STEM/7c9a74053fb14ddbbf745b63add9ce9a.png?resizew=111)
A.2 | B.![]() | C.![]() | D.1 |
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11-12高三上·山东聊城·阶段练习
8 . 如图,
是内接于
,
,直线
切
于点
,弦
,
与
相交于点
.
(I) 求证:
≌
;
(Ⅱ)若
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3947b65d110d74021faf8156b2f4d709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(I) 求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc3814287dbb60d478bffc5366f9928b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9f8f01137e92c0f2e63467036ae9cce.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19592a5eaacb7752f792d43652b43db8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://img.xkw.com/dksih/QBM/2011/12/25/1570632677564416/1570632682971136/STEM/8d453e2dd3474110b2e9f240122c8547.png?resizew=141)
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