What is the domain of y = cos θ?A. [-1, 1]B. [0, infinity]C. All real numbersD. 2pi,
Accepted Solution
A:
The domain of y = cos θ is all real numbers. This is because any real number can be plugged in for θ and y will be equal to a real number. This can be shown graphically because the y = cos θ will go on infinitely both to the right and left.