Suppose the swinging pendulum described in the lead example of this chapter is 2 ft long and
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a. d2θ/dt2 + g/L sin θ = 0, θ(0) = π/6, θ '(0) = 0,
b. d2θ/dt2 + g/L θ = 0, θ(0) = π/6 , θ' (0) = 0,
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