Use Identities to Find the Exact Value $\cos 165 ^ { \circ }$

question 187

Multiple Choice

Use Identities to find the exact value.
- $\cos 165 ^ { \circ }$

• A) \(\frac { \sqrt { 2 } - \sqrt { 6 } } { 4 }\)
• B) \(\frac { \sqrt { 6 } + \sqrt { 2 } } { 4 }\)
• C) \(\frac { - \sqrt { 6 } - \sqrt { 2 } } { 4 }\)
• D) \(\frac { \sqrt { 6 } - \sqrt { 2 } } { 4 }\)

Analyze and critically evaluate arguments in philosophical essays concerning ethical responsibilities to others.

Appreciate the interconnection between personal financial decisions and broader societal impacts.

Differentiate between stage and nonstage theories of development.

Identify key concepts of Piagetian theory, such as object permanence, operation, egocentrism, and conservation.

---

Definitions:

Medial Geniculate Nucleus

Major thalamic region concerned with audition.

Cochlea

Inner ear structure containing the auditory receptor cells.

Inner Ear

A complex structure in the ear responsible for hearing and balance, comprising the cochlea, vestibule, and semicircular canals.

Depolarization

Decrease in electrical charge across a membrane, usually due to the inward flow of sodium ions.