Write the Sum as a Product $\sin 4 x + \sin 5 x$

question 89

Multiple Choice

Write the sum as a product. $\sin 4 x + \sin 5 x$

• A) \(\sin 4 x \sin 5 x\)
• B) \(\sin 4 x \cos 5 x\)
• C) \(2 \sin ( 9 x / 2 ) \cos ( x / 2 )\)
• D) \(\sin 4 x \cos ( x / 2 )\)
• E) \(2 \sin 3 x \cos ( x / 2 )\)

---

Definitions:

Charisma

Provides vision and a sense of mission, and it instills pride along with follower respect and trust.

Cultural Tradition

The inherited and shared ways of living, which include beliefs, practices, and artifacts, carried from one generation to the next.

Continuous-process Technology

A production method characterized by a constant and non-interrupted manufacturing process.

Assembly-line System

A manufacturing process in which parts are added to a product in a sequential manner using a flow production method to create finished products efficiently.