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9. Suppose a particle traverses a path given by r(t) = (+2+1)i+(t sinht)j + (Int)k. Determine the speed of the particle when

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solution +(mt) Ginen, welt) = (Ft)i + (tsumht)? : vet) = (at) î + (tcosht + sunnt) § ++)R Therefore, speed of the banhele at

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