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माना कि f:[0,4pi] to [0,pi], f(x) = cos^...

माना कि `f:[0,4pi] to [0,pi], f(x) = cos^(-1)(cos x)` के द्वारा परिभाषित है। तब `[0,4pi]` में समीकरण `f(x) = (10-x)/10` को संतुष्ट करने वाले बिन्दुओं की संख्या है।

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