15)

\

The exact value of $\"\"$

\

Find the value.

\

$\"\"$

\

16)

\

The exact value of $\"\"$

\

Find the value.

\

$\"\"$

\

17)

\

The value of $\"\"$

\

Find the value.

\

$\"\"$

\

18)

\

The value of $\"\"$

\

Converts from radians into degrees by multiply $\"\"$

\

Find the value.

\

$\"\"$

\

21)

\

Observe the rightangle.

\

The triangle measures angles and sides are $\"\"$

\

Apply sine rule:

\

$\"\"$

\

Find Angle $\"\"$

\

Since, $\"\"$

\

Substitute $\"\"$

\

$\"\"$

\

Consider side $\"\"$

\

Find Side $\"\"$

\

Substitute $\"\"$ in sine rule.

\

$\"\"$

\

The side value of the rightangle triangle is $\"\"$

\

22)

\

Observe the rightangle.

\

The triangle measures angles and sides are $\"\"$

\

Find Angle $\"\"$

\

Since, $\"\"$

\

Substitute $\"\"$

\

$\"\"$

\

The angle of the rightangle triangle is $\"\"$