Basic AC Power POWER TRIANGLE 2. pf cosq q arctan I_C I_L I_R cos arctan I_C I_L I_R cos arctan 1.5 1.2 0.15 cos(arctan(2)) cos(63.4°) pf 0.45 3. P EIcosq (120)(0.34)(0.45) P 18.36  watts 4. Q EIsinq (120)(0.34)(0.89) Q 36.4  VAR 5. S EI (120)(0.34) S 40.8  VA Rev. 0 Page 15 ES-09