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On hans-dietrich's calculator, the sin and cos buttons clamp

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June 15, 2006
trigonometrypercentfunctionalgebra proposedalgebra

Problem Statement

Find all real solutions xx of the equation cos⁡cos⁡cos⁡cos⁡x=sin⁡sin⁡sin⁡sin⁡x\cos\cos\cos\cos x=\sin\sin\sin\sin x. (Angles are measured in radians.)
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