1. The problem statement, all variables and given/known data Give the equations for the plane polar unit vectors ^ ^ r and (theta) - - in terms of the Cartesian unit vectors ^ and ^ and hence show that i j - - ^ . ^ dr / dt = (theta) x theta - - 2. Relevant equations 3. The attempt at a solution I don't know how I can approach this question as I missed my lesson. I tried to google Polar Coordinates but the materials that I found weren't closely related to this. What topic should I look up? Any recommended websites? Thanks!