leads the voltage bytan⁻¹(3/5)
leads the voltage bytan⁻¹(3/4)
leads the voltage bytan⁻¹(5/9)
leads the voltage bytan⁻¹(5/8)
φ=arctan(XL−XCR)
With the given values, we get
φ=arctan(5−84)=arctan(−34)
Thus, the current leads the voltage by tan⁻¹(3/4).