(1)

\

Step 1:

\

The angle is $\"\"$ .

\

Periodicity identity of the sine function is : $\"\"$ .

\

Addition identity of the sine function is : $\"\"$ .

\

$\"\"$

\

Addition identity of the cosine function is : $\"\"$ .

\

$\"\"$

\

Addition identity of the tan function is : $\"\"$ .

\

$\"\"$

\

Solution :

\

$\"\"$ , $\"\"$ , and $\"\"$ .

\

\

(2)

\

Step 1:

\

The angle is $\"\"$ .

\

Additive identity of the sine function is : $\"\"$ .

\

$\"\"$

\

Addition identity of the cosine function is : $\"\"$ .

\

$\"\"$

\

Addition identity of the tan function is : $\"\"$ .

\

$\"\"$

\

Solution :

\

$\"\"$ , $\"\"$ , and $\"\"$ .