$\"\"$

\

(a) The function is $\"\"$ .

\

$\"\"$

\

Substitute $\"\"$ .

\

$\"\"$

\

$\"\"$ .

\

The integrand $\"\"$ is a odd function.

\

If $\"\"$ is an odd function, then $\"\"$ .

\

$\"\"$ .

\

$\"\"$

\

(b) The function is $\"\"$ .

\

$\"\"$

\

Substitute $\"\"$ .

\

$\"\"$

\

$\"\"$ .

\

The integrand $\"\"$ is a even function.

\

If $\"\"$ is an even function, then $\"\"$ .

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$ .

\

$\"\"$ .

\

$\"\"$

\

(c) The function is $\"\"$ .

\

$\"\"$

\

Substitute $\"\"$ .

\

$\"\"$

\

$\"\"$ .

\

The integrand $\"\"$ is a even function.

\

If $\"\"$ is an even function, then $\"\"$ .

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$ .

\

$\"\"$ .

\

$\"\"$

\

(d) The function is $\"\"$ .

\

$\"\"$

\

Substitute $\"\"$ .

\

$\"\"$

\

$\"\"$

\

The integrand $\"\"$ is a odd function.

\

If $\"\"$ is an odd function, then $\"\"$ .

\

$\"\"$ .

\

$\"\"$

\

(a) $\"\"$ .

\

(b) $\"\"$ .

\

(c) $\"\"$ .

\

(d) $\"\"$ .