TrigonometryChallengeInverse Trigonometric Functions ShareInverse Trigonometric Functions · Challenge problemFind the sum of all real numbers xxx in the interval [0,20][0,20][0,20] that satisfy arccos(cosx)=1\arccos\left(\cos x\right)=1arccos(cosx)=1.Check Show answer Walk through it step by step Practice more like this Review this concept