.
.
Then find two other pairs of polar coordinates of this point,
one with r>0 and one with r<0.
Solution:
Because the value of r is negative, we must rotate the point 180 degrees from
.
Two other pairs of polar coordinates of the same point:
at r < 0, the same point is attained when rotating theta 360 degrees,
therefore pt#2 = (
) ,
for r < 0
at r > 0,we can also see that when rotating theta 180 degrees we attain
which is the same point as
(
by:sh