满分5 >
初中数学试题 >
(2009•杭州)已知点P(x,y)在函数y=的图象上,那么点P应在平面直角坐标...
(2009•杭州)已知点P(x,y)在函数y=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021225806115512082/SYS201310212258061155120007_ST/0.png)
的图象上,那么点P应在平面直角坐标系中的( )
A.第一象限
B.第二象限
C.第三象限
D.第四象限
考点分析:
相关试题推荐
(2009•威海)如图,A,B的坐标为(2,0),(0,1),若将线段AB平移至A
1B
1,则a+b的值为( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021225806115512082/SYS201310212258061155120006_ST/images0.png)
A.2
B.3
C.4
D.5
查看答案
(2009•长春)菱形OABC在平面直角坐标系中的位置如图所示.∠AOC=45°,OC=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021225806115512082/SYS201310212258061155120005_ST/0.png)
,则点B的坐标为( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021225806115512082/SYS201310212258061155120005_ST/images1.png)
A.(
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021225806115512082/SYS201310212258061155120005_ST/1.png)
,1)
B.(1,
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021225806115512082/SYS201310212258061155120005_ST/2.png)
)
C.(
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021225806115512082/SYS201310212258061155120005_ST/3.png)
+1,1)
D.(1,
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021225806115512082/SYS201310212258061155120005_ST/4.png)
+1)
查看答案
(2009•仙桃)如图,把图中的⊙A经过平移得到⊙O(如左图),如果左图中⊙A上一点P的坐标为(m,n),那么平移后在右图中的对应点P’的坐标为( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021225806115512082/SYS201310212258061155120004_ST/images0.png)
A.(m+2,n+1)
B.(m-2,n-1)
C.(m-2,n+1)
D.(m+2,n-1)
查看答案
(2009•青岛)一艘轮船从港口O出发,以15海里/时的速度沿北偏东60°的方向航行4小时后到达A处,此时观测到其正西方向50海里处有一座小岛B.若以港口O为坐标原点,正东方向为x轴的正方向,正北方向为y轴的正方向,1海里为1个单位长度建立平面直角坐标系(如图),则小岛B所在位置的坐标是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021225806115512082/SYS201310212258061155120003_ST/images0.png)
A.(30
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021225806115512082/SYS201310212258061155120003_ST/0.png)
-50,30)
B.(30,30
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021225806115512082/SYS201310212258061155120003_ST/1.png)
-50)
C.(30
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021225806115512082/SYS201310212258061155120003_ST/2.png)
,30)
D.(30,30
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021225806115512082/SYS201310212258061155120003_ST/3.png)
)
查看答案
(2011•黔南州)在平面直角坐标系中,设点P到原点O的距离为p,OP与x轴正方向的夹角为a,则用[p,α]表示点P的极坐标,显然,点P的极坐标与它的坐标存在一一对应关系.例如:点P的坐标为(1,1),则其极坐标为[
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021225806115512082/SYS201310212258061155120002_ST/0.png)
,45°].若点Q的极坐标为[4,60°],则点Q的坐标为( )
A.(2,2
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021225806115512082/SYS201310212258061155120002_ST/1.png)
)
B.(2,-2
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021225806115512082/SYS201310212258061155120002_ST/2.png)
)
C.(2
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021225806115512082/SYS201310212258061155120002_ST/3.png)
,2)
D.(2,2)
查看答案