The function $\"\"$ is odd and the function $\"\"$ is even.

The function $\"\"$ is odd, then $\"\"$ .

the function $\"\"$ is even , then $\"\"$ .

The composite function $\"\"$ .

$\"\"$

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

$\"\"$

Therefore, the composite function $\"\"$ is even.

$\"\"$ is even.