$\"\"$

\

The angle is $\"\"$ .

\

The sides are $\"\"$ and $\"\"$ .

\

The area of triangle is $\"\"$ .

\

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

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

Therefore, the area of triangle is $\"\"$ .

\

$\"\"$

\

The area of triangle is $\"\"$ .