Initial 'phase shift' for inverting amplifiers

Note that if you use the function within the Oscilloscope to determine phase between the input and the output of an INVERTING amplifier, it will actually say it is 180deg or -180deg for very low frequencies. So you might want to subtract/add 180deg in any plots you do to make up for the negative gain A... but be also careful that the oscilloscope might 'jump' bewteen -180deg to 180deg so to really get quit of the 180deg shift smoothly you might want to add 180deg and then do a 'modulo' 360deg.