Find the velocity, acceleration, and speed of a particle with position function r(t) = (1t sin t, 1t cost, 9t²) v (t) = a(t) = || (t)|| (cos (t) — t sin (t)) -sin (t)- t cos (t)) 18 sqrt[(sin (t) + t cos (t))² + ( cos (t) — t sin (t))² + (18t)²]

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