Where are Vpp and V rms?

Vpp is Peak-to-Peak voltage, in other Words, in AC voltage, the peak-to-peak voltage is the potential difference between the lowest trough in the AC signal to the highest. Assuming the reference to the voltage is zero, Vpp would be twice the peak voltage (between zero and either the highest or lowest point in the AC waveform).

Vrms is the Root Mean Square voltage, think of it as sort of an average (it's not quite that simple). For a sine wave, the RMS voltage can be calculated by

y=a*sin(2ft)

where f is the frequency of the signal, t is time, and a is the amplitude or peak value.