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What is the domain of y=cos(2x)?
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What is the domain of y=cos(2x)?

What is the domain of y=cos(2x)?-example-1
User Cains
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Answer is C: (-∞, ∞)

User Downer
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Answer:

Explanation:

There is no restriction on the input values of x , since it is periodic it can have any real value. Hence the domain of cos (2x) is (-∞,∞).

Because cos is periodic the output value keeps on repeating for any smaller or bigger input x .

User Donovant
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