I am trying to find the equation of the tangent line in cartestian coordinates of the curve given in polar coordinates by

r=3-2 costheta, at theta=pi/3

i have that

http://www.freemathhelp.com/forum/mi...8724e707c4.gif

from there I am stuck on the rest I know that

http://www.freemathhelp.com/forum/mi...b26afd5730.gif

now can someone plz help me solve it