Use a Product-To-Sum Formula to Convert the Expression to a Sum

question 24

Multiple Choice

Use a product-to-sum formula to convert the expression to a sum or difference. Simplify where possible. $\sin 125 ^ { \circ } \sin 5 ^ { \circ }$

• A) \(\frac { 1 } { 2 } \sin 130 ^ { \circ } - \frac { \sqrt { 3 } } { 4 }\)
• B) \(- \frac { 1 } { 4 } - \frac { 1 } { 2 } \cos 130 ^ { \circ }\)
• C) \(\frac { 1 } { 2 } \sin 130 ^ { \circ } + \frac { \sqrt { 3 } } { 4 }\)
• D) \(\sqrt { 3 } \cos 65 ^ { \circ }\)
• E) \(\frac { 1 } { 2 } \cos 130 ^ { \circ } - \frac { 1 } { 4 }\)

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Definitions:

Unattended Information

Information that is present in the environment but is not the focus of one's attention or conscious awareness.

Working Memory Spans

A measurement of the capacity of working memory, often assessing how many items of information a person can hold and manipulate at one time.

Research Participants

Individuals or groups who partake in scientific studies, providing data for analysis.

Primed

Being prepared or made ready for a specific action or condition, often in the context of psychological processing where exposure to a stimulus influences response to a subsequent stimulus.