Electrical Engineering A resistor and an inductor connected in a series network impede the flow of an alternating current.
This impedance Z is determined by the reactance X of the
inductor and the resistance R of the resistor. The three quantities, all measured in ohms, can be represented by the sides
of a right triangle as illustrated, so Z 2 = X 2 + I?2. The angle
is called the phase angle. Suppose a series network has an
inductive reactance of X = 400 ohms and a resistance of
R = 600 ohms.
(a) Find the impedance Z.
(b) Find the values of the six trigonometric functions of the
phase angle .