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Homework Help: Phasor Method Addition

  1. Oct 6, 2008 #1
    1. The problem statement, all variables and given/known data
    Add the formulas
    y1 = 5.2 sin(ωt),
    y2 = 8.3 sin(ωt+30°),
    y3 = 15.5 sin(ωt+60°)
    using the phasor method.

    Your formula should only have numbers and the variables ω and t. The formula must be accurate for any value of those variables

    2. Relevant equations
    Not sure.

    3. The attempt at a solution
    Know I need to do algebra, but not sure how.
  2. jcsd
  3. Oct 6, 2008 #2
    You could just algebraically add them. For a visual, draw a phasor diagram. y1 will be a vector along 0 deg, y2 along 30 deg, and y3 along 60 deg. Although these values may not occur at the maximum amplitudes, the differences in phase will remain as they are (since the rate of oscillation is the same for each). From this, draw out a resultant vector.
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