Express the Product as a Sum Containing Only Sines or Cosines

question 275

Multiple Choice

Express the product as a sum containing only sines or cosines.
- $\sin ( 5 \theta ) \sin ( 2 \theta )$

• A) \(\frac { 1 } { 2 } [ \cos ( 7 \theta ) - \cos ( 3 \theta ) ]\)
• B) \(\frac { 1 } { 2 } [ \sin ( 7 \theta ) + \cos ( 3 \theta ) ]\)
• C) \(\frac { 1 } { 2 } [ \cos ( 3 \theta ) - \cos ( 7 \theta ) ]\)
• D) \(\sin ^ { 2 } \left( 10 \theta ^ { 2 } \right)\)

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Definitions:

Normal Retail Price

The standard selling price of a good or service in the retail market before any discounts or promotions are applied.

Computers

Electronic devices that execute specific tasks based on programmed instructions, capable of processing, storing, and retrieving data.

Break-even Price

The price level at which revenues equal costs, resulting in neither profit nor loss.

Overhead Expenses

Costs not directly tied to the production of goods or services, such as rent, utilities, and administrative salaries.