Homework Statement
Simplify (2cos2x-cos4x)/(2cos2x+cos4x)
The Attempt at a Solution
I let θ = 2x
(2cosθ-cos2θ)/2cosθ+cos2θ)
Since cos2θ= 1-2cos^2
(2cosθ-(1-2cos^2)/2cosθ+1-2cos^2
But I get lost when applying it and can't get beyond this, Do i have to use the quadratic...