(1)已知角α的终边经过点P(4,-3),求2sinα+cosα+tanα
(2)已知a为第二象限的角,sina=
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101223331038958024/SYS201311012233310389580019_ST/0.png)
,求tan2α
考点分析:
相关试题推荐
在下列四个命题中,把你认为正确的命题的序号都填在横线上
.
①函数
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101223331038958024/SYS201311012233310389580018_ST/0.png)
的定义域是
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101223331038958024/SYS201311012233310389580018_ST/1.png)
;
②已知
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101223331038958024/SYS201311012233310389580018_ST/2.png)
,且α∈[0,2π],则α的取值集合是
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101223331038958024/SYS201311012233310389580018_ST/3.png)
;
③函数f(x)=sin2x+cos2x图象的最大值为
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101223331038958024/SYS201311012233310389580018_ST/4.png)
;
④函数y=cos
2x+sinx的最小值为-1.
查看答案
把函数
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101223331038958024/SYS201311012233310389580017_ST/0.png)
的图象向右平移
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101223331038958024/SYS201311012233310389580017_ST/1.png)
,再将所得图象上各点的横坐标缩小为原来的
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101223331038958024/SYS201311012233310389580017_ST/2.png)
(纵坐标不变),得到的图象所对应的解析式为
.
查看答案
在△ABC中,已知
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101223331038958024/SYS201311012233310389580016_ST/0.png)
,求a=
.
查看答案
等差数列所有项的和为210,其中前4项的和为40,后4项的和为80,则项数为
.
查看答案
已知
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101223331038958024/SYS201311012233310389580014_ST/0.png)
=(2,3),
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101223331038958024/SYS201311012233310389580014_ST/1.png)
=(-4,7),则
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101223331038958024/SYS201311012233310389580014_ST/2.png)
在
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101223331038958024/SYS201311012233310389580014_ST/3.png)
上的投影等于
.
查看答案