$\"\"$

\

The function is $\"\"$ .

\

Maclaurin series of $\"\"$ :

\

$\"\"$ .

\

Find the value of $\"\"$ for five decimal places.

\

Convert $\"\"$ to radians.

\

$\"\"$ .

\

Substitute $\"\"$ in $\"\"$ .

\

$\"\"$ .

\

Therefore, the value of $\"\"$ is $\"\"$ .

\

$\"\"$

\

The value of $\"\"$ is $\"\"$ .