满分5 >
高中数学试题 >
下列是关于三角形解的个数的说法: ①a=7,b=14,A=30°,一解; ②a=...
下列是关于三角形解的个数的说法:
①a=7,b=14,A=30°,一解;
②a=30,b=25,A=150°,一解;
③c=6,b=9,C=45°,两解;
④b=9,c=10,B=60°,无解.
其中说法正确的有 .
考点分析:
相关试题推荐
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124419385209346/SYS201310251244193852093011_ST/images0.png)
如图所示的程序框图输出的结果为
.
查看答案
偶函数y=f(x)当x∈[0,+∞)时,f(x)=x-1,则f(x-1)<0的解集是
.
查看答案
若函数y=f(x)(x∈R)满足f(x+2)=f(x)且x∈[-1,1]时,f(x)=1-x
2,函数g(x)=
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124419385209346/SYS201310251244193852093009_ST/0.png)
,则函数h(x)=f(x)-g(x)在区间[-5,5]内的与x轴交点的个数为( )
A.5
B.7
C.8
D.10
查看答案
已知双曲线的顶点与焦点分别是椭圆
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124419385209346/SYS201310251244193852093008_ST/0.png)
的焦点与顶点,若双曲线的两条渐近线与椭圆的交点构成的四边形恰为正方形,则椭圆的离心率为( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124419385209346/SYS201310251244193852093008_ST/1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124419385209346/SYS201310251244193852093008_ST/2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124419385209346/SYS201310251244193852093008_ST/3.png)
D.
查看答案
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124419385209346/SYS201310251244193852093007_ST/images0.png)
设f′(x)是函数f(x)的导函数,y=f′(x)的图象如图所示,则y=f(x)的图象最有可能的是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124419385209346/SYS201310251244193852093007_ST/images1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124419385209346/SYS201310251244193852093007_ST/images2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124419385209346/SYS201310251244193852093007_ST/images3.png)
D.
查看答案