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31 October, 12:59

what is the domain of f (x) = cos (x) ? A. the set of real numbers - 2pi ≤ x ≤ 2pi B. the set of real numbers - 1≤x≤1 C. the set of real numbers 0≤x≤2pi D. the set of all real numbers

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  1. 31 October, 16:25
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    Answer: D. the set of all real numbers

    Step-by-step explanation:

    The domain of cos x and sine x are set of real numbers, that is the domain is

    {-∞, + ∞}
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