If cos(x)=14\cos(x) = \frac{1}{4}cos(x)=41 and xxx is in the first quadrant, what is sin(2x)\sin(2x)sin(2x)?
158\frac{\sqrt{15}}{8}815
154\frac{\sqrt{15}}{4}415
152\frac{\sqrt{15}}{2}215
18\frac{1}{8}81