Use the Cofunction Identities to Evaluate the Expression Below Without $\cos ^ { 2 } 20 ^ { \circ } + \cos ^ { 2 } 57 ^ { \circ } + \cos ^ { 2 } 70 ^ { \circ } + \cos ^ { 2 } 33 ^ { \circ }$

question 215

Multiple Choice

Use the cofunction identities to evaluate the expression below without the aid of a calculator. $\cos ^ { 2 } 20 ^ { \circ } + \cos ^ { 2 } 57 ^ { \circ } + \cos ^ { 2 } 70 ^ { \circ } + \cos ^ { 2 } 33 ^ { \circ }$

• A)1
• B)2
• C)-1
• D)0
• E) \(\frac { 1 } { 2 }\)

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Definitions:

Behavioral Problems

Actions or behaviors that are disruptive or inappropriate, often observed in children and adolescents, which can be a sign of underlying psychological or social issues.

DSM-5 Diagnosis

The process of identification of mental health and behavioral conditions using the fifth edition of the Diagnostic and Statistical Manual of Mental Disorders.

Antisocial Personality Disorder

A mental health disorder characterized by a disregard for and violation of the rights of others.

Sociopath

A term often used to describe a person with Antisocial Personality Disorder, characterized by a lack of empathy and manipulative or harmful behavior.