Use a Sum or Difference Identity to Find the Exact $\sin \frac { 7 \pi } { 24 } \cos \frac { \pi } { 8 } - \cos \frac { 7 \pi } { 24 } \sin \frac { \pi } { 8 }$

question 220

Multiple Choice

Use a sum or difference identity to find the exact value.
- $\sin \frac { 7 \pi } { 24 } \cos \frac { \pi } { 8 } - \cos \frac { 7 \pi } { 24 } \sin \frac { \pi } { 8 }$

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

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