Question: How can I solve this differential equation?

Hi

This is the problem:

deq := (2*.1)*[(y(t)*(diff(y(t), t, t))-1)*(1+(diff(y(t), t))^2)^(3/2)-y(t)*(diff(y(t), t))^2*(diff(y(t), t, t))*sqrt(1+(diff(y(t), t))^2)]-2*sin(t)*(1+(diff(y(t), t))^2)^2 = 0;

dsolve({deq, y(0) = 0, (D(y))(0) = 0}, y(t), numeric)

 

Error, (in DEtools/convertsys) unable to convert to an explicit first-order system

 

So Maple signs an error, but I don't know why.

Any help will be appreciated.

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