precalculus
posted by Tom on .
Graph each complex number. Then express it in rectangular form.
2(cos(4pi/3) + isin(4pi/3))
I don't understand where to go from here.

cos(4pi/3) =  1/2
sin(4pi/3) =  √3/2
so
2(cos(4pi/3) + isin(4pi/3)) = 1/2  (√3/2)i
here is a nice page for this topic
http://www.allaboutcircuits.com/vol_2/chpt_2/5.html