阿摩線上測驗
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阿摩線上測驗
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6.(30%) Consider the following set of differential equations
(a) (10%) Express the differential equations using the polar coordinate； i.e. express the equations in terms of (r, θ), where x1(t) =r(t) cos(θ(t)) and x2(t) =r(t) sin(θ(t).