Does anybody know the reason why the angle 22.0°become negative -22.0° when plug into this formula P=IrmsVrms cos (φ) from the question below? Both way will give me the same answer but the reason behind the negative, I don't know.
An AC source with Vrms = 135.0 V and Irms = 11.5 A is connected to a series RLC circuit in which the current leads the voltage by 22.0°. What are the following for this circuit?
(a) total resistance R