How do you find the domain of cosx?

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How do you find the domain of cosx?

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Answer 1 · 2016-06-09T19:37:24

$cos (x)$ $cos(x)$ does not have singularities. You can give to $x$ $x$ any number and the $cos$ $cos$ will "work".
So the domain are all the real numbers, or, in symbols, $\mathbb{R}$ .

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How do you find the domain of cosx?

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