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Question: error on plotting vector field

Question:error on plotting vector field

Lalalaika 10
error plot vector field detools
March 07 2013
1

Hello, I have a problem in plotting the vector field of dx/dt=sinx/sint

It shows me an error:

Error, (in DEtools/dfieldplot) unable to evaluate function `sin(x)` in evalhf

Dunno how to fix it

Here is my code:

DE := [diff(x(t), t) = sin(x)(t)/sin(t)];
with(DEtools):
DC:=[sin(x)/sin(t),.1]:
dfieldplot(DE, x(t), t = -2 .. 2, x = -1 .. 2, arrows = medium, title = 'Diff', color = DC);
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