HP HP-67 - Page 106

Example 3: Engineer Tobias Slothrop has determined that in the RC
circuit shown above, the total impedance is 77.8 ohms and voltage
lags current by 36.5°. What are the values of resistance R and
capacitive reactance X, in the circuit?
Method: Draw a vector diagram using total impedance 77.8 ohms for
polar magnitude » and —36.5° for angle . When the values are
converted to rectangular coordinates, the x-coordinate value yields
resistance R in ohms, and the y-coordinate value yields reactance X,
in ohms.
Solution:
Press Display
o
Degrees
mode
selected.
(Note that results can
remain from previous
examples.)