What is the value of cos(2θ)\cos(2\theta)cos(2θ) if cos(θ)=14\cos(\theta) = \frac{1}{4}cos(θ)=41?
−78-\frac{7}{8}−87
−18-\frac{1}{8}−81
18\frac{1}{8}81
78\frac{7}{8}87