Two 50Hz sinusoidal waveforms, Va and Vb, where Va lags Vb by 27°. add the sinusoidal graphs Va and Vb by a graphical method and draw the resultant waveform. Can you help me find the correct "graphical method" to use to solve this problem.

Thank you!

 

What is the problem . Divide the waves into intervals. Measure the values and add them together. Then interpolate between the segments.

 

At any point in time, just add the value of the two waveform voltages, including the sign, to get the added value. Do this for as many points in time as you need to get a smooth summed resulting waveform.