Find the Exact Value of the Expression $\sin 255 ^ { \circ } \cos 15 ^ { \circ } - \cos 255 ^ { \circ } \sin 15 ^ { \circ }$

question 255

Multiple Choice

Find the exact value of the expression.
- $\sin 255 ^ { \circ } \cos 15 ^ { \circ } - \cos 255 ^ { \circ } \sin 15 ^ { \circ }$

• A) \(- \frac { \sqrt { 3 } } { 2 }\)
• B) \(- \frac { 17 } { 4 }\)
• C) \(- \frac { 1 } { 2 }\)
• D) \(\frac { \sqrt { 3 } } { 2 }\)