Find the Exact Value of the Expression $\cos \left( - 2130 ^ { \circ } \right)$

question 206

Multiple Choice

Find the exact value of the expression.
- $\cos \left( - 2130 ^ { \circ } \right)$

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

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Definitions:

Tricyclics

A class of antidepressant drugs that help correct chemical imbalances of neurotransmitters in the brain to treat mood disorders.

Dibenzodiazepine

A chemical class that includes certain psychoactive drugs, typically used for their anxiolytic, anticonvulsant, and muscle relaxant properties.

Phenothiazines

A class of antipsychotic medications used to treat mental disorders such as schizophrenia.

Butyrophenone

A class of antipsychotic medication used to treat psychiatric disorders, known for its effectiveness in managing symptoms of schizophrenia.