TrigonometryHardGraphs of Sine and Cosine ShareGraphs of Sine and Cosine · Hard problemHow many solutions does cos(2x)=cos(4x)\cos{\left(2 x \right)} = \cos{\left(4 x \right)}cos(2x)=cos(4x) have on [0,2π)[0, 2\pi)[0,2π)?Check Show answer Walk through it step by step Practice more like this Review this concept