Find the Exact Value of the Given Expression Using a Sum

question 40

Multiple Choice

Find the exact value of the given expression using a sum or difference formula.
$\cos \frac { 7 \pi } { 12 }$

• A) \(\frac { \sqrt { 3 } - 1 } { 2 \sqrt { 2 } }\)
• B) \(\frac { - \sqrt { 3 } - 1 } { 2 \sqrt { 2 } }\)
• C) \(\frac { \sqrt { 3 } + 1 } { 2 \sqrt { 2 } }\)
• D) \(\frac { - \sqrt { 3 } + 1 } { 2 \sqrt { 2 } }\)

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Definitions:

Depressive Disorders

A group of conditions characterized by persistent feelings of sadness, emptiness, and despondency, significantly impacting daily functioning and quality of life.

Rapidly

Occurring in a short period of time or happening quickly.

Motor Disturbances

Disruptions or impairments in the capacity to perform voluntary muscle movements, often indicative of neurological disorders.

Schizophrenia

A mental disorder characterized by disruptions in thought processes, perceptions, emotional responsiveness, and social interactions.