I have tried this one over and over and can't get the right answer. Can anyone help?

Consider the parametric equation

x = 16(cosθ+ θsinθ)

y = 16(sinθ− θcosθ)

What is the length of the curve for θ = 0 to θ = [3/10] π?

I have L=sqrt (dx/dt)^2 + (dy/dt)^2

dx/dt = 16t (sin(t)+sin(t)+t cos(t))

dy/dt= 16t (-cos(t)-cos(t)+t sin(t))

Is that right?