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:

Communication Model

A theoretical framework that describes the process of transferring information from a sender to a receiver, highlighting the components and barriers involved.

Sender

The person or entity who initiates a message or communication, aiming to convey information or an idea to one or more recipients.

Message

A piece of communicated information, whether verbal, written, or digital.

Encoding

The process of converting information or data into a particular form, often for storage, transmission, or encryption purposes.