1. The problem statement, all variables and given/known data I'm trying to find the best solution for solving a problem in which I must form an operation with three vectors in polar form, ending with a sum in rectangular form. The operation is as follows: (5 [itex]\angle[/itex] 0°) + (20 [itex]\angle[/itex] -90°) - (6 [itex]\angle[/itex]180°) = 2. Relevant equations Z1[itex]\angleθ[/itex] + Z2[itex]\angleθ[/itex] = (Z1 + Z2) [itex]\angleθ[/itex], (X1 + jY1) + (X2 + jY2) = (X1 + X2) + j(Y1 + Y2) 3. The attempt at a solution I tried using the Triangle Law R= (a+b)+(b+c). I'm not sure if I did this correctly or not, but I ended up with this vector in rectangular form: -9 + j1.1*10-15 I'm posting to verify if I did this correctly or if I missed anything.