Respuesta :
A 90° clockwise rotation about the origin takes a point (x, y) and maps it to
(y, -x).
(y, -x).
90 degrees clockwise rotation about the origin means
Let's say that the point is (x,y) and it lies in first quadrant .
Now the rotation is 90 degrees clockwise .
So the points shifts to second quadrant.
It means that x coordinate will stay positive and y coordinate will become negative now.
and x and y will interchange
So the exact rule is
(x,y) changes to (-y,x) ,
i.e. 1) Change the sign of y
2) Switch x and y
