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Which of the following represents the domain and range of y = cos X?

Which of the following represents the domain and range of y = cos X?-example-1

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4 votes
Answer:

Domain: -∞ < x < ∞

Range: -1 ≤ y ≤ 1

Option A is correct

Step-by-step explanation:

The given function is:

y = cos x

The graph of y = cos x is plotted below

The domain of a function is a set of all the valid/real inputs of that function

The range of a function is a set of all the valid/real outpouts

Note that the given cosine function (y = cos x) can take in all real values of x. This means that is domain is a set of all real numbers

cosx has a range between -1 and 1

Therefore, the domain and range of y = cos x are:

Domain: -∞ < x < ∞

Range: -1 ≤ y ≤ 1

Which of the following represents the domain and range of y = cos X?-example-1
User Rick Wayne
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