(a) Show that if Van = 400/33 V, Vbn = 400/87 V, and Vbn = 400/207 V, that Van + Vbn +
Chapter 12, Problem 15(choose chapter or problem)
(a) Show that if \(V_{an}=400\angle33^{\circ}\mathrm{\ V}\), \(V_{bn}=400\angle-87^{\circ}\mathrm{\ V}\), and \(V_{bn}=400\angle-207^{\circ}\mathrm{\ V}\), that \(\mathbf{V}_{a n}+\mathbf{V}_{b n}+\mathbf{V}_{c n}=0\). (b) Do the voltages in part (a) represent positive or negative phase sequence? Explain.
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