Use a Double Angle Formula to Rewrite the Given Expression $10 \cos ^ { 2 } x - 5$

question 173

Multiple Choice

Use a double angle formula to rewrite the given expression. $10 \cos ^ { 2 } x - 5$

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

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Definitions:

Cochlea

A spiral-shaped cavity in the inner ear containing the organ of Corti, which produces nerve impulses in response to sound vibrations.

Endo-

A prefix meaning within or inside, often used in medical and scientific terms.

Peri-

A prefix meaning around or surrounding, often used in medical terms to describe areas surrounding a structure or organ.

Audi/o

A prefix meaning related to hearing or sound.