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$The function f (x) = \cos^{- 1} (\cos x) is$

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continuous at x=π

Discontinuous at x=π

Discontinuous at x=−π

fx=x ∀x∈R

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detailed solution

Correct option is A

fx=cos−1cosx=2π+x for −2π

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The function f(x)=cos−1⁡(cos⁡x) is

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$The function f (x) = \cos^{- 1} (\cos x) is$