TrigonometrySuperchallengeTrigonometric Equations ShareTrigonometric Equations · Superchallenge problemHow many solutions does cosxcos2xcos4x=18\cos x\cos 2x\cos 4x = \dfrac{1}{8}cosxcos2xcos4x=81 have in the interval [0,2π)[0, 2\pi)[0,2π)?Check Show answer Walk through it step by step Practice more like this Review this concept