Convert the Expression $\cos 4 \alpha$ A) $\cos ^ { 2 } 2 \alpha - \sin ^ { 2 } 2 \alpha$

question 5

Multiple Choice

Convert the expression. $\cos 4 \alpha$

• A) \(\cos ^ { 2 } 2 \alpha - \sin ^ { 2 } 2 \alpha\)
• B) \(\cos ^ { 2 } 2 \alpha + \sin ^ { 2 } 2 \alpha\)
• C) \(\cos ^ { 4 } 2 \alpha + \sin ^ { 4 } 2 \alpha\)
• D) \(\cos ^ { 4 } 2 \alpha - \sin ^ { 4 } 2 \alpha\)
• E) \(\cos ^ { 4 } 2 \alpha - \sin ^ { 2 } 2 \alpha\)

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Definitions:

Placenta

The placenta is an organ that develops in the uterus during pregnancy, providing oxygen and nutrients to the fetus and removing waste products.

Expulsion

The act of forcing or pushing something out or away.

Intrauterine Device

A small contraceptive device typically made of plastic and copper that is inserted into the uterus to prevent pregnancy.

Effectiveness Rate

A measure of the success of a treatment, medication, or intervention in achieving its intended result under typical everyday conditions.