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The domain of $C o s^{- 1} \sqrt{2 x}$ is

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[−1,1]

[−12,12]

[0,12]

[1,12]

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Correct option is C

cos-12x is defined if 2x∈-1,1. ⇒0≤2x≤1 ∵2x≥0 ⇒0≤x≤12

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The domain of Cos−12x is

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The domain of $C o s^{- 1} \sqrt{2 x}$ is