A projectile is launched from the base of a fixed incline that makes an angle \(\phi\) with the horizontal, where \(0 \le \phi < \dfrac{\pi}{2}\). The projectile is fired with an initial speed \(v_0\) at an angle \(\theta\) above the horizontal, where \(\phi < \theta < \dfrac{\pi}{2}\). Neglecting air resistance, which of the following expressions represents the maximum distance \(R_{\text{max}}\) the projectile can travel along the inclined surface, optimized over all possible launch angles \(\theta\)?