What is wrong with my following vector plot

I am trying to plot the following:

VectorPlot[{Abs[
D[((-3 Cos[Sin[t]])/(Sqrt[
9 Cos^2[Sin[t]] + 4 Sin^2[Sin[t]]]))/(Sqrt[
9 Cos[Sin[t]]^2 + 4 Sin^2 [Sin[t]]]), t]],
Abs[D[((2 Sin[Sin[t]])/(Sqrt[
9 Cos^2[Sin[t]] + 4 Sin^2[Sin[t]]]))/(Sqrt[
9 Cos^2[Sin[t]] + 4 Sin^2[Sin[t]]]), t]]}, {t, -10, 10}]

I get this error: Any suggestions as to where I am going wrong? It is probably something ridiculously simple, and if that is the case I apologize. Just really a beginner trying to figure this programming out.

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– user9660
Feb 27 '15 at 4:35