While the general idea of the two waves adding is apparent in the graph, it takes a moment of inspection to determine the wave magnitudes and the precise phase relationships between them. The phasor d...While the general idea of the two waves adding is apparent in the graph, it takes a moment of inspection to determine the wave magnitudes and the precise phase relationships between them. The phasor diagram is based on the complex plane discussed previously where the horizontal is the real axis and the vertical is the imaginary (\(j\)) axis.