Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Phasor representation

  1. Jan 31, 2009 #1
    Draw the phasor representation for each of the following signals. Also write the signal as one sinusoid, v(t) = 20cos(200t+45°)+cos(200t)

    From this equation, do I have to turn to v(t) = A sin (ωt + φ) ? If yes, how can I convert it?

    Thank you.
  2. jcsd
  3. Jan 31, 2009 #2
    I think its asking to first draw the phasors for each one of the cosine waves in v(t). Then add the cosine waves together and write the equation for v(t) as a single sinusoid in the form you listed: A sin (ωt + φ). When drawing the phasors you'll probably want to convert each part of the signal from the time-domain to frequency domain, A∠φ. Hope that helps.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook