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1. Sinusoidal AC Waveforms question is killing my brain
Study these mathematical equations for two sinusoidal AC waveforms:

v1 = 120sinwt volts
v2 = 180sin(wt-pi/4) volts

Add and subtract these waveforms together graphically and by using a phasor diagram. Compare the results obtained from each of these methods.

WHAT THE HELL?!
Last edited by cmiller; 08-06-2012 at 18:22.
2. Sinusoidal AC Waveforms question is killing my brain
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3. Re: Sinusoidal AC Waveforms question is killing my brain
For the phasor diagram; draw an arrow on the x axis then one at an angle of 45 degrees beneath the horizontal from the origin, they represent the two waveforms.

To add them you can take components along the axis to find the resultant waveform, reverse the direction of the second phasor when you have to subtract them.

Not sure what it means by graphic method - drawing the graphs doesn't seem to help, maybe it means add them like vectors then use the cosine rule?
Last edited by XiaoXiao1; 15-06-2012 at 13:05.