Write the Product as a Sum or Difference of Trigonometric $4 \cos 18 ^ { \circ } \cos 9 ^ { \circ }$

question 115

Multiple Choice

Write the product as a sum or difference of trigonometric functions.
- $4 \cos 18 ^ { \circ } \cos 9 ^ { \circ }$

• A) \(2 \left( \cos 27 ^ { \circ } - \cos 9 ^ { \circ } \right)\)
• B) \(2 \left( \cos 27 ^ { \circ } + \cos 9 ^ { \circ } \right)\)
• C) \(2 \left( \sin 27 ^ { \circ } - \sin 9 ^ { \circ } \right)\)
• D) \(4 \left( \sin 27 ^ { \circ } + \sin 9 ^ { \circ } \right)\)

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Definitions:

Curiosity

is the intrinsic desire or motivation to learn, explore, and seek out new knowledge or experiences, driven by the pursuit of understanding unfamiliar aspects of one's environment.

Sensation Seeking

A personality trait defined by the search for experiences and feelings that are varied, novel, complex, and intense, and the willingness to take physical, social, legal, and financial risks for the sake of such experiences.

Risks

The potential for losing something of value or the possibility of an unfavorable outcome.

Sensation Seeking Behavior

A trait characterized by the search for experiences and feelings that are varied, complex, novel, and intense.