
William W. answered 05/12/20
Experienced Tutor and Retired Engineer
(1, 225) - This is the same point only rotating counterclockwise (in the positive theta direction) instead of negative (-135°)
(-1, 45°) - This point rotates in the positive theta direction then goes across the diameter in the negative direction to get to the same point.
(-1, -315°) - This point rotates in the negative theta direction all the way around to be the same as the +45° noted above and then goes across the diameter in the negative direction to get to the same point.