Determine the values of amplitude \(C\) and phase \(\phi\) in the relation (13.48) of harmonic oscillator given by (13.36). The proper frequency of the system is \(\omega_{o}=\sqrt{\frac{k}{m}}\), the total mechanical energy \(E\) and the initial speed \(v(0)=v_{o}

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A x(t) = C cos(wot +) with C = A + B; cos : = (13.48) A + B