Evaluate the Expression $\cos 10 \alpha$ A) $\cos ^ { 2 } 5 \alpha + \sin ^ { 2 } 5 \alpha$

question 29

Multiple Choice

Evaluate the expression. $\cos 10 \alpha$

• A) \(\cos ^ { 2 } 5 \alpha + \sin ^ { 2 } 5 \alpha\)
• B) \(\cos ^ { 4 } 5 \alpha + \sin ^ { 4 } 5 \alpha\)
• C) \(\cos ^ { 4 } 5 \alpha - \sin ^ { 4 } 5 \alpha\)
• D) \(\cos ^ { 2 } 5 \alpha - \sin ^ { 2 } 5 \alpha\)
• E) \(\cos ^ { 4 } 5 \alpha - \sin ^ { 2 } 5 \alpha\)

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Definitions:

Maturation

The process of development in which an individual matures or reaches full functionality.

Imprinting

The process by which certain animals form strong attachments during early life.

Critical Period

A particular period in development where learning specific skills or abilities is easiest.

Optimal Period

A time frame during which a particular developmental and learning opportunity is most effective.