Express the Product as a Sum Containing Only Sines or Cosines

question 241

Multiple Choice

Express the product as a sum containing only sines or cosines.
- $\sin ( 3 \theta ) \cos ( 4 \theta )$

• A) \(\sin \cos \left( 12 \theta ^ { 2 } \right)\)
• B) \(\frac { 1 } { 2 } [ \cos ( 7 \theta ) + \sin \theta ]\)
• C) \(\frac { 1 } { 2 } [ \cos ( 7 \theta ) - \cos \theta ]\)
• D) \(\frac { 1 } { 2 } [ \sin ( 7 \theta ) - \sin \theta ]\)

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Definitions:

Non-Adjusting Event

An event that occurs after the reporting period that does not necessitate adjustments to the financial statements because it does not provide new information about conditions at the end of the reporting period.

Doubtful Debts Expense

An accounting concept referring to the provision a company makes to account for amounts it expects will not be collected from debtors.

Depreciation Expense

An accounting method that allocates the cost of a tangible asset over its useful life, reflecting wear and tear or obsolescence.

Long-Service Leave

An employee benefit offering paid leave to those who have been employed by the same company for a long period of time, typically recognized in countries like Australia.