## Precalculus (6th Edition) Blitzer

$1$; $-1$; $[-1, 1]$
The sine and the cosine functions have $1$ as their maximum value and $-1$ as their mnimum value. Thus, their range is $[-1, 1]$. Therefore, the missing expression in the given statements are (in order): $1$; $-1$; $[-1, 1]$