Complete the sentence below. The domain of both the sine and cosine functions is and the range is (Type your answers in interval notation. Type exact answers, using $\pi$ as needed.)

Step 1 ：The domain of both the sine and cosine functions is $(-\infty, \infty)$ and the range is $[-1, 1]$. So, the final answer is: \(\boxed{\text{The domain of both the sine and cosine functions is } (-\infty, \infty) \text{ and the range is } [-1, 1]}\)