(a) What are the algebraic signs of (x, v_{x}), and (a_{x}) when the phase (phi(t)=omega t+phi_{mathrm{i}}) is...
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(a) What are the algebraic signs of \(x, v_{x}\), and \(a_{x}\) when the phase \(\phi(t)=\omega t+\phi_{\mathrm{i}}\) is between 0 and \(\frac{\pi}{2}\) ?
(b) Repeat for \(\pi<\phi(t)<\frac{3 \pi}{2}\).
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