Question: Maple Integral not Evaluating

Hello
 

I have problem that Maple is not evaluating integral (I need equation for distance for Lissajous curve):

restart;
with(Physics);
with(LinearAlgebra);
with(IntegrationTools);

x := A*sin(a*t + d);
y := B*sin(b*t);

u := diff(x, t);
u2 := diff(y, t);
u3 := sqrt(u^2 + u2^2);

u5 := int(u3, t);

I am only getting:

 

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