1. Question 1604
    was: Polar Coordinates - Graph sketching - r=a
    now: Polar Coordinates - Graph sketching - Circle: r = a
  2. Question 1605
    was: Polar Coordinates - Graph sketching - r=cos at
    now: Polar Coordinates - Graph sketching - r = a trig(bt)
  3. Question 1606
    was: Polar Coordinates - Graph sketching - Spirals
    now: Polar Coordinates - Graph sketching - Investigate Polar Spirals
  4. Question 1608
    was: Polar Coordinates - Graph sketching - r = A + Bsin t
    now: Polar Coordinates - Graph sketching - r = a(p + q trig(t))
  5. Question 1611
    was: Polar Coordinates - Graph sketching - r = p sec(q-t)
    now: Polar Coordinates - Graph sketching - r = p trig(q - t)
  6. Question 1613
    was: Polar Coordinates - Graph sketching - r = acos²(t)
    now: Polar Coordinates - Graph sketching - r = a trig²(t)
  7. Question 1614
    was: Polar Coordinates - Graph sketching - Other curves
    now: Polar Coordinates - Graph sketching - More Polar Curves
  8. Question 2293
    was: Polar Coordinates - Graph sketching - r² = cos(at)
    now: Polar Coordinates - Graph sketching - r² = a trig(bt)