$\"\"$

The trigonometric function is $\"\"$ .

Consider $\"\"$ .

Rewrite the function as $\"\"$ .

Apply half-angle formula : $\"\"$ .

$\"\"$

Graph :

Draw a coordinate plane.

Graph the function $\"\"$ in the interval $\"\"$ .

$\"graph$

Observe the graph of the function :

The graph of $\"\"$ is vertically stretches 3 units and shifts 3 units upwards from the graph of $\"\"$ .

$\"\"$

Graph of the function $\"\"$ is :

$\"graph$