$\"\"$

The function is $\"\"$ .

The amplitude of the function is $\"\"$ .

The period of the function is $\"\"$ .

Therefore one period of cycle is $\"\"$ .

To sketch the graph, divide the interval of one period $\"\"$ into required intervals of same width.

Scale the $\"\"$ -axis using $\"\"$ as the basic unit.

Adjust the scale on the $\"\"$ -axis to accommodate the amplitude $\"\"$ .

$\"\"$

Scale the $\"\"$ -axis using $\"\"$ as the basic unit.

Adjust the scale on the $\"\"$ -axis to accommodate the amplitude $\"\"$ .