Use a Double-Angle Formula or Half-Angle Formula to Simplify $\frac { \sin 48 ^ { \circ } } { 1 + \cos 48 ^ { \circ } }$

Use a double-angle formula or half-angle formula to simplify $\frac { \sin 48 ^ { \circ } } { 1 + \cos 48 ^ { \circ } }$ .