满分5 >
高中数学试题 >
已知α,β均为锐角,且,则(1+tanα)(1+tanβ)= .
已知α,β均为锐角,且
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024180229589901847/SYS201310241802295899018011_ST/0.png)
,则(1+tanα)(1+tanβ)=
.
考点分析:
相关试题推荐
已知f(x),g(x)是定义在R上的函数,f(x)=a
xg(x)(a>0且a≠1),
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024180229589901847/SYS201310241802295899018009_ST/0.png)
,在有穷数列
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024180229589901847/SYS201310241802295899018009_ST/1.png)
(n=1,2…,10)中,任意取正整数k(1≤k≤10),则前k项和大于
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024180229589901847/SYS201310241802295899018009_ST/2.png)
的概率是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024180229589901847/SYS201310241802295899018009_ST/3.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024180229589901847/SYS201310241802295899018009_ST/4.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024180229589901847/SYS201310241802295899018009_ST/5.png)
D.
查看答案
已知S={1,2,3,…2010},A⊆S且A中有三个元素,若A中的元素可构成等差数列,则这样的集合A共有( )
A.C
20103个
B.A
32010个
C.2A
21005个
D.2C
21005个
查看答案
如图,点F为椭圆
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024180229589901847/SYS201310241802295899018007_ST/0.png)
=1(a>b>0)的一个焦点,若椭圆上存在一点P,满足以椭圆短轴为直径的圆与线段PF相切于线段PF的中点,则该椭圆的离心率为( )
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024180229589901847/SYS201310241802295899018007_ST/images1.png)
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024180229589901847/SYS201310241802295899018007_ST/1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024180229589901847/SYS201310241802295899018007_ST/2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024180229589901847/SYS201310241802295899018007_ST/3.png)
D.
查看答案
S
n是数列{a
n}的前n项和,则“数列{S
n}为等差数列”是“数列{a
n}为常数列”的( )条件
A.充分不必要
B.必要不充分
C.充要
D.既不充分也不必要
查看答案