Use a Double-Angle Formula to Rewrite the Expression

question 3

Multiple Choice

Use a double-angle formula to rewrite the expression. ​
10 cos² x - 5
​

• A)5 cos x
• B)​cos 5x
• C)​10 cos 2x
• D)​10 cos x
• E)​5 cos 2x

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Definitions:

Conflicting Childhood Feelings

Emotional states experienced during childhood that are characterized by contrasting or opposing emotions toward situations, people, or oneself.

Psychoanalysis

A therapeutic approach founded by Sigmund Freud, focusing on uncovering unconscious motives and conflicts as means of understanding and treating psychological disorders.

Primary Aim

The main goal or objective that an individual, group, or project is seeking to achieve.

Psychoanalysts

Professionals in a field of psychology that studies the unconscious mind and uses techniques like free association and dream analysis for therapy.