Respuesta :
Answer: all real numbers
C.)
Step-by-step explanation: APEX
The domain of cosine is all real number. Then the correct option is C.
What are domain and range?
The domain means all the possible values of x and the range means all the possible values of y.
The function is given as,
f(x) = cos(x)
Then the domain of cosine is real number and the range of the cosine function is [-1, 1].
Then the correct option is C.
More about the domain and range link is given below.
https://brainly.com/question/12208715
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