Find the Exact Value of the Expression $\frac { 1 } { 2 }$

question 143

Multiple Choice

Find the exact value of the expression.
-cos (-390°)

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

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Definitions:

Ethical Principle

A fundamental guideline or value system that directs behaviors and decision-making processes in various contexts, including medical and professional settings.

Fidelity

The degree of loyalty, faithfulness, and accuracy in reproducing a sound or image, or in human relationships, loyalty to a person, cause, or belief.

Laboratory Results

Outcomes and findings from diagnostic tests carried out in a laboratory, including blood tests, cultures, and imaging studies, forming a crucial part of patient assessment.

Moral Distress

A psychological discomfort experienced when one's moral or ethical beliefs are compromised by the situation or environment.