$\"\"$

The integral is $\"\"$ .

The volume of the solid obtained by rotating about $\"\"$ -axis, the region of the curve $\"\"$ from $\"\"$ to $\"\"$ is

$\"\"$ .

Rewrite the integral $\"\"$ as $\"\"$ .

Compare the above expression with $\"\"$ .

Here $\"\"$ .

Integral represents volume of the solid obtained by rotating about $\"\"$ -axis, the region of the curve $\"\"$ from $\"\"$ to $\"\"$ .

$\"\"$

Integral represents volume of the solid obtained by rotating about $\"\"$ -axis, the region of the curve $\"\"$ from $\"\"$ to $\"\"$ .