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)