\frac{1}{\frac{1}{2} \sin(2x)} = 2\sqrt{2} \Rightarrow \frac{2}{\sin(2x)} = 2\sqrt{2} \Rightarrow \frac{1}{\sin(2x)} = \sqrt{2} \Rightarrow \sin(2x) = \frac{1}{\sqrt{2}} = \frac{\sqrt{2}}{2}.