Basic AC Power POWER TRIANGLE 3. pf cosq q arctan X R cos arctan X R cos arctan 16 8 cos(arctan(2)) cos(63.4°) pf 0.45 4. P EIcosq (71.6)(4)(0.45) P 128.9  watts 5. Q EIsinq (71.6)(4)(0.89) Q 254.9  VAR 6. S EI (71.6)(4) S 286.4  VA Rev. 0 Page 13 ES-09