Write the Product as a Sum or Difference of Trigonometric $2 \cos 7 x \cos 4 x$

question 254

Multiple Choice

Write the product as a sum or difference of trigonometric functions.
- $2 \cos 7 x \cos 4 x$

• A) \(\sin 11 x + \sin 3 x\)
• B) \(\frac { 1 } { 2 } ( \cos 11 x + \cos 3 x )\)
• C) \(\cos 3 x - \cos 11 x\)
• D) \(\cos 11 x + \cos 3 x\)

---

Definitions:

Shock

A medical condition characterized by a significant reduction in blood flow to body tissues, resulting in cellular damage and organ dysfunction.

Clammy Skin

A condition where the skin feels cold and wet, often as a result of illness, anxiety, or the environment.

Dilated Pupils

A condition where the pupils of the eyes become larger or wider than normal, which can be a reaction to various conditions, light levels, or substances.

Heatstroke

A severe heat-related illness characterized by an elevated body temperature, potentially leading to death if not treated promptly.