TrigonometryChallengeCircles & Lines ShareCircles & Lines · Challenge problemHow many xxx in [0,2π)[0, 2\pi)[0,2π) satisfy sin4x−cos4x=1\sin^4 x - \cos^4 x = 1sin4x−cos4x=1?A111B444C000D222E333Check Show answer Walk through it step by step Practice more like this Review this concept