Forward and backward rotating phasor notation

Discussion in 'Homework Help' started by Farisal2012, Jul 31, 2014.

  1. Farisal2012

    Thread Starter New Member

    Jul 31, 2014
    2
    0
    Can someone please explain to me what this question is asking:

    Using forward and backward rotating phasor notation, X=3<30°. If the
    angular frequency is 1 rads-1, x(2) is:

    (a) 5.994 (b) 5.088 (c) -4.890

    The answer is C
     
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  2. MrChips

    Moderator

    Oct 2, 2009
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    3,360
    Your question is taken out of context. Show us the rest of the paper.
     
  3. Farisal2012

    Thread Starter New Member

    Jul 31, 2014
    2
    0
  4. t_n_k

    AAC Fanatic!

    Mar 6, 2009
    5,448
    782
    Use the relationship given:-

    x(t)=Xe^{j \omega t}+X^*e^{-j \omega t}

    where ...

    t=2 [sec], ω=1 [rad/sec]

    X=3\under{/ +30^o}

    and

    X^*=3\under{/ -30^o}
     
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