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AP® Calculus AB-BC

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Behavior of ${ a }_{ n }=\cos { \frac { n\pi }{ 4 } } $

APCALC-1UYG@H

The sequence ${ a }_{ n }=\cos { \frac { n\pi }{ 4 } } $

A

Converges to $1$.

B

Is bounded.

C

Is unbounded.

D

Diverges to infinity.