Math 317 HW3:

Due Wednesday, Feb. 1 in class.

Section 14.3:  55, 57

Section 14.4:   28, 36, 40 

(for problem 28, you may use a calculator)

TOP of page 885 (Kepler's 3rd Law): 2, 3

Review exercises: 14, 21

Show that a space curve is a planar curve (i.e., contained in a 
plane) if and only if its torsion is zero for all points on the curve
(you may assume that the curve has a smooth parametrization that is 
THREE TIMES continuously differentiable; FOR THE "ONLY IF' PART YOU MAY ASSUME 
THAT THE CURVATURE IS NONZERO FOR ALL POINTS).