Question

The Unit Circle

What is the domain of a cosine function?

a. irrational numbers
b. All real numbers
c. rational numbers
d. positive integers

Please select the best answer from the choices provided

Answer 1

B) All real numbers

The graph of the cosine function looks like this: The domain of the function y=cos(x) is all real numbers (cosine is defined for any angle measure), the range is −1≤y≤1 .

Answer 2

B. All real numbers

Explanation:

I calculated it logically