Can you please help me sorry this is hard for me but i’ll give u brainliest and 70 points
2 answers:
You might be interested in
ANSWER
d. The set of all real numbers
EXPLANATION
The basic cosine function ,
is continuous everywhere.
The function is defined for all real values of x.
The domain is the set all values of x that will make the function defined.
The domain is all real numbers.
The correct choice is D.