$\"\"$

\

A mounted surveilllance camera oscillates and view part of a circular region.

\

$\"\"$ and $\"\"$ in meters.

\

Graph:

\

$\"\"$

\

$\"\"$

\

The area of sector of a circle with radius $\"\"$ and central angle is $\"\"$ is $\"\"$ .

\

Where, $\"\"$ is the measured angle in radians.

\

The angle of sector is

\

$\"\"$

\

Convert in degree to radians.

\

$\"\"$

\

The polar distance formula is

\

$\"\"$

\

$\"\"$

\

The area of sector of a circle is $\"\"$ .

\

Substitute $\"\"$ and $\"\"$ in the above formula.

\

$\"\"$

\

$\"\"$

\

The area of sector of a circle is $\"\"$ .

\

$\"\"$

\

The area of sector of a circle is $\"\"$ is $\"\"$ .