If \( \displaystyle \int \frac{\sin^{\frac{3}{2}} x + \cos^{\frac{3}{2}} x}{\sqrt{\sin^3 x \cos^3 x \sin(x - \theta)}} dx = A \sqrt{\cos\theta \tan x - \sin\theta} + B \sqrt{\cos\theta - \sin\theta \cot x} + C \), where \( C \) is the integration constant, then \( AB \) is equal to: