Well, that would be imposible to solve. You are missing the radius. But if the radius was 5, then it would be simple.
Ф=240.0 degreese = 4.19 radians.
x=-2.50
y=-4.33
If the radius is different, then check out this website that me and my team has put togather. http://www.intmath.com/complex-numbers/convert-polar-rectangular-interactive.php
The second one if im not wrong
Answer:
x=4
Step-by-step explanation:
You can use the app photo math, thats what I did you just take a pic of the problem and it shows you the steps and answer