as we know ,the equation to the undamped forced vibration is(adsbygoogle = window.adsbygoogle || []).push({});

x=Asin{(w1+w2)/2}sin{(w1-w2)/2},the symbols have their usual meaning..but i can't understand how (w1+w2)/2 comes in picture in the phasor diagram...also its significance

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# Forced undamped vibration

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