... extra attention). A complex number written in rectangular notation551CHAPTER30h '>22% vtComplex NumbersComplex numbers are an extension of the ordinary numbers used in everyday ... complex number. This complex number is called theimpedance, and is given the symbol: Z. This means:In words, the complex number representing the sinusoidal voltage is equal tothe complex number ... part of the complex number, while the vertical axisis the imaginary part. Since real numbers are those complex numbers that havean imaginary part equal to zero, the real number line is the same...