1 . 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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1002次组卷
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5卷引用:智能测评与辅导[文]-直线与圆
智能测评与辅导[文]-直线与圆(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)(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
17-18高二·全国·课后作业
2 . 直线x-y+m=0与圆x2+y2=1相交的一个充分不必要条件是( )
A.0<m<1 | B.-4<m<2 |
C.m<1 | D.-3<m<1 |
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3 . 如图所示,AB=
,BC=2,CD=1,∠ABC=45°,则四边形ABCD的面积为( )
![](https://img.xkw.com/dksih/QBM/2017/8/14/1758200027602944/1817081830170624/STEM/fd6956734e5342f2ae9929be17ec80d6.png?resizew=102)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://img.xkw.com/dksih/QBM/2017/8/14/1758200027602944/1817081830170624/STEM/fd6956734e5342f2ae9929be17ec80d6.png?resizew=102)
A.![]() | B.![]() | C.![]() | D.![]() |
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4 . 如图所示,AB是⊙O的直径,BC,CD,DA是⊙O的弦,且BC=CD=DA,则∠BCD=( )
![](https://img.xkw.com/dksih/QBM/2017/8/14/1758200027602944/1817081830137856/STEM/e711075f5ea141e1bf6213c09ea62d22.png?resizew=98)
![](https://img.xkw.com/dksih/QBM/2017/8/14/1758200027602944/1817081830137856/STEM/e711075f5ea141e1bf6213c09ea62d22.png?resizew=98)
A.100° | B.110° |
C.120° | D.135° |
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5 . 如图所示,AB,AC为⊙O的切线,B和C是切点,延长OB到D,使BD=OB,连接AD.如果∠DAC=78°,那么∠ADO等于( )
![](https://img.xkw.com/dksih/QBM/2017/8/14/1758200027602944/1817081830121472/STEM/64ed8ceb4a404a37adda7d5882151db3.png?resizew=107)
![](https://img.xkw.com/dksih/QBM/2017/8/14/1758200027602944/1817081830121472/STEM/64ed8ceb4a404a37adda7d5882151db3.png?resizew=107)
A.70° | B.64° |
C.62° | D.51° |
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6 . 圆内接四边形ABCD中,∠A,∠B,∠C的度数比是2∶3∶6,则∠D=( )
A.67.5° | B.135° |
C.112.5° | D.110° |
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7 . 如图所示,⊙O中弧AB的度数为60°,AC是⊙O的直径,那么∠BOC=( )
![](https://img.xkw.com/dksih/QBM/2017/8/14/1758200027602944/1817081830072320/STEM/d2cd89a74cd44cce871ac2ef0d36f3bc.png?resizew=92)
![](https://img.xkw.com/dksih/QBM/2017/8/14/1758200027602944/1817081830072320/STEM/d2cd89a74cd44cce871ac2ef0d36f3bc.png?resizew=92)
A.150° | B.130° | C.120° | D.60° |
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8 . 如图所示,PA与圆O相切于点A,不过圆心O的割线PCB与直径AE相交于D点.已知∠BPA=30°,AD=2,PC=1,则圆O的半径等于________ .
![](https://img.xkw.com/dksih/QBM/2017/8/14/1758200027602944/1817081830203392/STEM/91b436abd3534b12b4bbcc4893490293.png?resizew=87)
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9 . 如图所示,在⊙O中,相交于点E的两弦AB,CD的中点分别是M,N,直线MO与直线CD相交于点F.证明
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/26/cdcc2cdf-e541-42c8-bbce-48c05d3a473d.png?resizew=240)
(1)∠MEN+∠NOM=180°;
(2)FE·FN=FM·FO.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/26/cdcc2cdf-e541-42c8-bbce-48c05d3a473d.png?resizew=240)
(1)∠MEN+∠NOM=180°;
(2)FE·FN=FM·FO.
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10 . 如图所示,AB是半圆O的直径,点C在半圆上,CD⊥AB于点D,且AD=3DB,设∠COD=θ,则tan2
=__ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a16d92d3ccdf0ecfaa43eb8ed62ae5a4.png)
![](https://img.xkw.com/dksih/QBM/2017/8/14/1758200027602944/1817081830195200/STEM/027e6e38fed14b0d94131d2fd983e44c.png?resizew=107)
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