David Kelman

tan(Θ) = 2/x dx/dt = -600 y = 2 Start with tan(Θ) = 2/x.Taking the derivative leaves you with: sec^2(Θ)*dΘ/dt = -2/x^2*dx/dt Solve for dΘ/dt. dΘ/dt = -2/x^2 * dx/dt * 1/sec^2(Θ) when the distance from the plane to the kangaroo is 3, x = sqrt(5); so Θ = ar...