I need to know how to do it for both clockwise and counterclockwise.
2007-12-17 22:09:54 · 4 answers · asked by blondebarbie55 1 in Science & Mathematics ➔ Mathematics
(x,y)<-->(- x , y)---------Anticlockwise
(x,y)<-->(x , - y)---------Clockwise
2007-12-18 06:45:51 · answer #1 · answered by Como 7 · 3⤊ 1⤋
anticlockwise::
x'= -y, y'= x
clockwise::
x'=y, y'= -x
we know x=r*cos(A), y= r*sin(A); where r is distance of the point from origin r=sqrt(x*x + y*y)
on rotating by 90degrees-
either x= r*cos(90+A) or r*cos(A-90)
and y=r*sin(90+A) or r*sin(A-90)
2007-12-18 06:25:47 · answer #2 · answered by Fantail Flycatcher 3 · 0⤊ 0⤋
(x,y)......(-y,x) FOR ANTICLOCKWISE
FOR CLOCKWISE,SUBTRACT THE ANGLE FROM 360 TO GET 270.THEN USE (X,Y).....(Y,-X)
2007-12-18 07:47:10 · answer #3 · answered by scholar 1 · 0⤊ 0⤋
Clockwise
Points are (x.y)
New poins become (-y,x)
anti clocwise
Points are (x,y)
New points become (y,-x)
2007-12-18 06:15:05 · answer #4 · answered by Murtaza 6 · 0⤊ 0⤋