(f(t) = Cos(pi(t)/4) , T

Anonymous

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(f(t) = cos(pi(t)/4) , t<=10) Find the velocity at time t.

 

Answer No.1

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F'(t) = -(pi/4)Sin(pi(t)/4)

Answer No.2

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= - sin (pi/4 t) * 4/pi

Answer No.3

Anonymous

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F'(t) = - π/4 sin πt/4

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