Using a Sum or Difference Identity, Write the Following as an Expression

Multiple Choice

Using a sum or difference identity, write the following as an expression involving functions of x.
- $$\sqrt { \frac { 1 - \cos 66 ^ { \circ } } { 2 } }$$

A) $\tan 33 ^ { \circ }$
B) $\sin 33 ^ { \circ }$
C) $\cot 33 ^ { \circ }$
D) $\cos 33 ^ { \circ }$