$\"\"$

The amplitude is $\"\"$ .

The time period $\"\"$ .

The object starts at a vertical position and moves downward.

The function is of the form $\"\"$ , where $\"\"$ is the frequency.

$\"\"$

Substitute $\"\"$ .

$\"\"$

$\"\"$ .

Substitute $\"\"$ and $\"\"$ in $\"\"$ .

$\"\"$ .

The function is $\"\"$ .

$\"\"$

The function is $\"\"$ .