满分5 >
高中数学试题 >
△ABC中,BC=3,A=30°,B=60°,则AC等于( ) A.3 B.3 ...
△ABC中,BC=3,A=30°,B=60°,则AC等于( )
A.3
B.3
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123721212969818/SYS201310251237212129698004_ST/0.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123721212969818/SYS201310251237212129698004_ST/1.png)
D.2
考点分析:
相关试题推荐
设f(x)=
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123721212969818/SYS201310251237212129698003_ST/0.png)
,则f[f(-3)]等于( )
A.3
B.-3
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123721212969818/SYS201310251237212129698003_ST/1.png)
D.-1
查看答案
函数f(x)=(m
2-m-1)x
m是幂函数,且在x∈(0,+∞)上为增函数,则实数m的值是( )
A.2
B.3
C.4
D.5
查看答案
若集合A={x||x|≤1,x∈R},B={y|y=x
2,x∈R},则A∩B=( )
A.{x|-1≤x≤1}
B.{x|x≥0}
C.{x|0≤x≤1}
D.∅
查看答案
i是虚数单位,复数z=
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123721212969818/SYS201310251237212129698000_ST/0.png)
的虚部是( )
A.-i
B.-1
C.1
D.2
查看答案
已知椭圆C
1的方程为
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123721212967866/SYS201310251237212129678021_ST/0.png)
+y
2=1,双曲线C
2的左、右焦点分别是C
1的左、右顶点,而C
2的左、右顶点分别是C
1的左、右焦点.
(1)求双曲线C
2的方程;
(2)若直线l:y=kx+
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123721212967866/SYS201310251237212129678021_ST/1.png)
与双曲线C
2恒有两个不同的交点A和B,且
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123721212967866/SYS201310251237212129678021_ST/2.png)
•
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123721212967866/SYS201310251237212129678021_ST/3.png)
>2(其中O为原点),求k的取值范围.
查看答案