1. The problem statement, all variables and given/known data I am going over examples in my textbook and I came across this: I don't understand how they converted 18.265 at angle of 39.9 to 14.02+j11.71 2. Relevant equations I know how to convert from the imaginary numbers into the angle form, usually I use: Is there another equation when going in the other direction, or do I use the same ones. I will have two equations and two unknowns, one with tan and one with the square root? It seems a bit complicated and I feel like I am missing out on something, but I can't find it on my formula sheet or in my notes so I am a bit confused. Thanks !