25 vectros CH3 Ex1,2

- how to find a Cartesian point given polar coordinates
Ex1) The polar coordinates of a point are r=5.50 m and theta = 240 . what are the Cartesian coordinates of this point?
Ex2) The rectangular coordinates of a point area given by (2,y), and its polar coordinates are (r,30) . Determine (a) the value of y and (b) the value of r.