Evaluate the Expression $\sin x \sin ( x + y ) + \cos x \cos ( x + y )$

question 19

Multiple Choice

Evaluate the expression.​ $\sin x \sin ( x + y ) + \cos x \cos ( x + y )$ ​

• A) \(\sin ^ { 2 } x - \sin ^ { 2 } y\)
• B)0
• C) \(\sin x \cos x + \sin y \cos y\)
• D) \(\cos y\)
• E) \(\cos ^ { 2 } x - \sin ^ { 2 } x\)

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Definitions:

Transactional Model of Stress

A framework that emphasizes the individual's perception and appraisal of a stressful event as crucial in determining their stress response.

Attribution Theory

A psychological theory that explains how individuals interpret and assign causes to behaviors and events around them.

Positive Stressor

An event or situation that causes stress but is perceived as beneficial or motivating, leading to improved performance or well-being.

Distress

Emotional, mental, or physical strain or suffering that can negatively impact well-being.