1. The problem statement, all variables and given/known data 50 volts, 60 Hz http://peecee.dk/upload/view/363429 I have to find the current through R, C, and L. Total current. Totalt impedance. 2. Relevant equations I=(U/Z) 3. The attempt at a solution See picture: http://peecee.dk/upload/view/363430 For I_R it must be (50/150)=0.333. And as it is a resistor, the angle must be 0, so 0.333∠0 ? On my TI89 i can sum all the currents on complex form, but how to do it in mathcad? On the TI89 it is just (3∠90)+(4∠90) etc. Thank you in advance.