Step 1:

The amplitude $\"\"$ .

The time period $\"\"$ seconds.

An object that moves on a coordinate axis so that the distance $\"\"$ from its rest position at time $\"\"$ , then the function is $\"\"$ .

The object starts at a vertical position, so $\"\"$ .

$\"\"$

The function of the form $\"\"$ .

Solution:

The function of the form $\"\"$ .