1. The problem statement, all variables and given/known data Consider a velocity field where the radial and tangenetial components of velocity are V_r=0 and V_theta=cr, respectively, where c is a constant. Obtain the equations of the streamlines. 2. Relevant equations x=rcos(theta) y=rsin(theta) 3. The attempt at a solution I know how to obtain the equations of the streamlines. I don't know how to translate the polar coordinates into cartesian. Since V_r=0, wouldn't there be no x-component? But looking at the textbook solution, there is an x component. Any help would be appreciated. Thanks.