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A pendulum moving in simple harmonic moon is modelled by the function s(t)= -5 cos(t/4),where s is measured in inches and t is measured in

A pendulum moving in simple harmonic moon is modelled by the function s(t)= -5 cos(t/4),where s is measured in inches and t is measured in seconds. Determinine gthe first time when the distance moves is 4 inches 0.82s 2.6 s 3.2 s 9.9s

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