如图正方形场地ABCD边长为200m,在A附近已先占用以A为圆心以100m为半径的
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224525478052936/SYS201311012245254780529018_ST/0.png)
圆的场地,今要在余下场地上建一矩形楼房,使矩形两边分别在BC和CD上,问:这幢楼房的最大占地面积是多少m
2?
考点分析:
相关试题推荐
已知函数
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224525478052936/SYS201311012245254780529017_ST/0.png)
(ω>0)的最小正周期为π.
(Ⅰ)求ω的值;(Ⅱ)求f(x)的单调递减区间;
(Ⅲ)求函数f(x)在区间
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224525478052936/SYS201311012245254780529017_ST/1.png)
上的最大值.
查看答案
下列说法:
①函数
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224525478052936/SYS201311012245254780529016_ST/0.png)
是最小正周期为π的偶函数;
②函数
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224525478052936/SYS201311012245254780529016_ST/1.png)
可以改写为
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224525478052936/SYS201311012245254780529016_ST/2.png)
;
③函数
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224525478052936/SYS201311012245254780529016_ST/3.png)
的图象关于直线
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224525478052936/SYS201311012245254780529016_ST/4.png)
对称;
④函数y=tanx的图象的所有的对称中心为(kπ,0),k∈Z;
⑤将函数y=sin2x的图象先向左平移
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224525478052936/SYS201311012245254780529016_ST/5.png)
个单位,然后纵坐标不变,横坐标伸长为原来
的2倍,所得图象的函数解析式是
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224525478052936/SYS201311012245254780529016_ST/6.png)
;
其中所有正确的命题的序号是
.(请将正确的序号填在横线上)
查看答案
给出下列命题:
①函数
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224525478052936/SYS201311012245254780529015_ST/0.png)
是偶函数;
②函数
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224525478052936/SYS201311012245254780529015_ST/1.png)
在闭区间
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224525478052936/SYS201311012245254780529015_ST/2.png)
上是增函数;
③直线
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224525478052936/SYS201311012245254780529015_ST/3.png)
是函数
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224525478052936/SYS201311012245254780529015_ST/4.png)
图象的一条对称轴;
④将函数
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224525478052936/SYS201311012245254780529015_ST/5.png)
的图象向左平移
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224525478052936/SYS201311012245254780529015_ST/6.png)
单位,得到函数y=cos2x的图象;
其中正确的命题的序号是:
.
查看答案
如果执行如图所示的程序框图,那么输出的S=
.
查看答案
已知向量
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224525478052936/SYS201311012245254780529013_ST/0.png)
,
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224525478052936/SYS201311012245254780529013_ST/1.png)
满足
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224525478052936/SYS201311012245254780529013_ST/2.png)
=3,
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224525478052936/SYS201311012245254780529013_ST/3.png)
=4,
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224525478052936/SYS201311012245254780529013_ST/4.png)
与
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224525478052936/SYS201311012245254780529013_ST/5.png)
的夹角是120°则
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224525478052936/SYS201311012245254780529013_ST/6.png)
=
.
查看答案