Answer
$1$;
$-1$;
$[-1, 1]$
Work Step by Step
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):
$1$;
$-1$;
$[-1, 1]$
