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28 November, 20:52

The equation gives the position s = f (t) of a body moving on a coordinate line (s in meters, t in seconds) s=-4+3 cos t Find the body's velocity at time t=pi/3 sec.

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  1. 28 November, 22:51
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    6*cos (pi/4) + sin (pi/4) = 6*sqrt (2) / 2 + sqrt (2) / 2 = 7*sqrt (2) / 2 = 3.5*sqrt (2
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