Question: Please help with practice questions 3 and 4. 3. Assume that the position of a particle at time t is given by the path r(t)

Please help with practice questions 3 and 4.

Assume that the position of a particle at time t is given by the path r(t) = (sin(9t), cos(81), cos(31)). Find the speed 1) of the 1: particle at timer 2 5' (Use symbolic notation and fractions where needed.) v(%)= :

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