Don't be embarassed, the calculator instructions are marginal at best. This is why it's best to use the calculator you intend to use for the exam all through your preparations.
Sorry, what I meant was, what is polar notation for -3 +j5?
The long way:
root(-3^2 + 5^2) = 5.83
tan^-1(5/-3) = -59 deg (and this angle is incorrect!)
Picture the real axis (the horizontal abcissa, positive to the right) and the imaginary axis (the vertical ordinate, positive upwards), the angle formed by -3 and j5 is somewhere in the northwest quadrant. So the correct angle is 121 deg.
So, I like a calculator that converts polar to rectangular automatically and vice versa;
I don't have to remember change the orientaton of the angle by 180 deg if real part is negative. It's just one less thing to distract me from the problem at hand. I made this mistake a few times prior to having a calculator that would do it for me - I would be slogging through a bunch of calculations, trying to get the problem done quickly, and I would forget this important step.
Keep at it and please trust me when I say that the only stupid question is the one that should be asked, and isn't. You have seen that there are folks here that are willing to help - Art, Grover, clay1492, and Frontier05 to name just a few. :thumbsup: