Write the Expression in Terms of Sine and Cosine, and Simplify

question 139

Multiple Choice

Write the expression in terms of sine and cosine, and simplify so that no quotients appear in the final expression.
- $\sin 115 ^ { \circ } \cos 55 ^ { \circ } - \cos 115 ^ { \circ } \sin 55 ^ { \circ }$

• A) \(\frac { \sqrt { 3 } } { 3 }\)
• B) \(\frac { 1 } { 2 }\)
• C) \(\frac { 23 } { 12 }\)
• D) \(\frac { \sqrt { 3 } } { 2 }\)

---

Definitions:

Incentive Spirometer

A device used to help patients improve the functioning of their lungs by encouraging deep breathing.

Medical-Surgical Unit

A hospital division that specializes in providing care for patients who require medical treatment or surgery.

Blood Glucose Monitoring

The practice of regularly checking the levels of glucose in the blood, essential for managing conditions like diabetes.

Diabetic Support Group

A community or collective offering assistance and information for individuals living with diabetes.