Write the Expression as the Sine, Cosine, or Tangent of an Angle

question 287

Multiple Choice

Write the expression as the sine, cosine, or tangent of an angle.
- $\cos 7 x \cos 4 x - \sin 7 x \sin 4 x$

• A) \(\sin 11 x\)
• B) \(\sin 3 x\)
• C) \(\cos 11 \mathrm { x }\)
• D) \(\cos 3 x\)

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Definitions:

Expenses

Costs incurred during a period by a business or individual in the process of earning revenue.

Function

The specific role or activity for which something is used or responsible within a system, organism, or machine.

Gross Profit Margin

Gross profit margin is a financial metric expressed as a percentage that measures the financial health of a company by indicating the proportion of money left over from revenues after accounting for the cost of goods sold (COGS).

Sales

The transactions in which goods or services are transferred from seller to buyer for money or other compensation.