满分5 >
高中数学试题 >
已知△ABC中,角A、B、C的对边分别为a、b、c且a=1,∠B=45°,S△A...
已知△ABC中,角A、B、C的对边分别为a、b、c且a=1,∠B=45°,S△ABC=2,则b= .
考点分析:
相关试题推荐
已知平面区域Ω={(x,y)|
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183159224718703/SYS201310241831592247187007_ST/0.png)
},M={(x,y)|
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183159224718703/SYS201310241831592247187007_ST/1.png)
},向区域Ω内随机投一点P,点P落在区域M内的概率为( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183159224718703/SYS201310241831592247187007_ST/2.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183159224718703/SYS201310241831592247187007_ST/3.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183159224718703/SYS201310241831592247187007_ST/4.png)
D.
查看答案
若一个正三棱柱的三视图如图所示,则这个正三棱柱的表面积为( )
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183159224718703/SYS201310241831592247187006_ST/images0.png)
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183159224718703/SYS201310241831592247187006_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183159224718703/SYS201310241831592247187006_ST/1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183159224718703/SYS201310241831592247187006_ST/2.png)
D.
查看答案
已知双曲线
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183159224718703/SYS201310241831592247187005_ST/0.png)
的一条渐近线方程为
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183159224718703/SYS201310241831592247187005_ST/1.png)
,则双曲线的离心率为( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183159224718703/SYS201310241831592247187005_ST/2.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183159224718703/SYS201310241831592247187005_ST/3.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183159224718703/SYS201310241831592247187005_ST/4.png)
D.
查看答案
函数f(x)=ln(x+1)-
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183159224718703/SYS201310241831592247187004_ST/0.png)
的零点所在的大致区间是( )
A.(0,1)
B.(1,2)
C.(2,3)
D.(3,4)
查看答案
已知{a
n}是等差数列,a
10=10,其前10项和S
10=70,则其公差d=( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183159224718703/SYS201310241831592247187003_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183159224718703/SYS201310241831592247187003_ST/1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183159224718703/SYS201310241831592247187003_ST/2.png)
D.
查看答案