Angle notation or phasor notation is a notation used in electronics.
Bioelectrical impedance analysis (BIA) is a commonly used method for estimating body composition, and in particular body fat.
A complex number is a number that can be expressed in the form, where and are real numbers, and is a solution of the equation.
Electrical impedance is the measure of the opposition that a circuit presents to a current when a voltage is applied.
Phase is the position of a point in time (an instant) on a waveform cycle.
In physics and engineering, a phasor (a portmanteau of phase vector), is a complex number representing a sinusoidal function whose amplitude (A), angular frequency (ω), and initial phase (θ) are time-invariant.
A sine wave or sinusoid is a mathematical curve that describes a smooth periodic oscillation.