1) I solved 9 coupled non linear differential equation and Mathematica give me the result like this.(adsbygoogle = window.adsbygoogle || []).push({});

{{y1[t]->InterpolatingFunction[{{0.001,0.01}},<>][t],

y2[t]->InterpolatingFunction[{{0.001,0.01}},<>][t],

y3[t]->InterpolatingFunction[{{0.001,0.01}},<>][t],

y4[t]->InterpolatingFunction[{{0.001,0.01}},<>][t],

y5[t]->InterpolatingFunction[{{0.001,0.01}},<>][t],

y6[t]->InterpolatingFunction[{{0.001,0.01}},<>][t],

y7[t]->InterpolatingFunction[{{0.001,0.01}},<>][t],

y8[t]->InterpolatingFunction[{{0.001,0.01}},<>][t],

y9[t]->InterpolatingFunction[{{0.001,0.01}},<>][t]}}

How can I plot each of the function (y1 to y9) separately?

2) To solve a single differential equation (refer to the Mathematica NDSolve Help) and plot it, why we must divide by the answer itself? I mean, in this case, why should I divide by " .s " ?

s = NDSolve[{y'[x] == y[x] Cos[x + y[x]], y[0] == 1}, y, {x, 0, 30}]

Plot[Evaluate[y[x] /. s], {x, 0, 30}, PlotRange -> All]

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# How to plot the result of NDSolve?

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