The functions $\"\"$ is an odd function and $\"\"$ is an even function.

Since the function $\"\"$ is an odd function $\"\"$ .

Since the function $\"\"$ is an even function $\"\"$ .

Show $\"\"$ is an even function.

Definition of composite function : $\"\"$ .

$\"\"$

$\"\"$ .

$\"\"$

Show $\"\"$ is an even function. \ \

$\"\"$

$\"\"$ .

$\"\"$

The composite functions $\"\"$ and $\"\"$ .