so u = -cos(t) + sqrt(3)sin(t)(adsbygoogle = window.adsbygoogle || []).push({});

so the Wo = 1, and R =2, but how do i find delta?

tan(del) = sqrt(3)/-1, but the answer has it as

u = 2cos(t-2pi/3)

i can't get the 2pi/3 no matter what i do...

thanks

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# Mechinical vibration - simple

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