SOLUTION: Write and sketch: write the following complex numbers in rectangular form and sketch their representation in Argand diagram: 4 cis 120° My rectangular form what i got: -2+(2sqr

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Question 1170557: Write and sketch: write the following complex numbers in rectangular form and sketch their representation in Argand diagram: 4 cis 120°
My rectangular form what i got: -2+(2sqrt3)i.
Is it correct and how do i SKetch it as a Argand diagram?
Answer by ikleyn(52747) About Me  (Show Source):
You can put this solution on YOUR website!
.

(1)  Your rectangular form is correct.


(2)  To make a sketch, follow your rectangular form:


     Take the point on the plane, which has x-coordinate -2  and y-coordinate 2%2Asqrt%283%29 
     and mark it by the pen on graph paper.  That is all: the sketch is ready.

Solved, with all necessary explanations.